diff --git a/src/ai/adjacent_ai_system.rs b/src/ai/adjacent_ai_system.rs
index b06c58d..6014ade 100644
--- a/src/ai/adjacent_ai_system.rs
+++ b/src/ai/adjacent_ai_system.rs
@@ -27,29 +27,33 @@ impl<'a> System<'a> for AdjacentAI {
             let idx = map.xy_idx(pos.x, pos.y);
             let (w, h) = (map.width, map.height);
             // Evaluate adjacent squares, add possible reactions
+            let mut eval_idx: usize = idx;
             if pos.x > 0 {
-                evaluate(idx - 1, &map, &factions, &faction.name, &mut reactions);
+                eval_idx = idx - 1;
             }
             if pos.x < w - 1 {
-                evaluate(idx + 1, &map, &factions, &faction.name, &mut reactions);
+                eval_idx = idx + 1;
             }
             if pos.y > 0 {
-                evaluate(idx - w as usize, &map, &factions, &faction.name, &mut reactions);
+                eval_idx = idx - w as usize;
             }
             if pos.y < h - 1 {
-                evaluate(idx + w as usize, &map, &factions, &faction.name, &mut reactions);
+                eval_idx = idx + w as usize;
             }
             if pos.y > 0 && pos.x > 0 {
-                evaluate((idx - w as usize) - 1, &map, &factions, &faction.name, &mut reactions);
+                eval_idx = (idx - w as usize) - 1;
             }
             if pos.y > 0 && pos.x < w - 1 {
-                evaluate((idx - w as usize) + 1, &map, &factions, &faction.name, &mut reactions);
+                eval_idx = (idx - w as usize) + 1;
             }
             if pos.y < h - 1 && pos.x > 0 {
-                evaluate((idx + w as usize) - 1, &map, &factions, &faction.name, &mut reactions);
+                eval_idx = (idx + w as usize) - 1;
             }
             if pos.y < h - 1 && pos.x < w - 1 {
-                evaluate((idx + w as usize) + 1, &map, &factions, &faction.name, &mut reactions);
+                eval_idx = (idx + w as usize) + 1;
+            }
+            if eval_idx != idx {
+                evaluate(eval_idx, &factions, &faction.name, &mut reactions);
             }
             let mut done = false;
             for reaction in reactions.iter() {
@@ -72,13 +76,7 @@ impl<'a> System<'a> for AdjacentAI {
 }
 
 /// Evaluates all possible reactions between this faction and all entities on a given tile idx.
-fn evaluate(
-    idx: usize,
-    map: &Map,
-    factions: &ReadStorage<Faction>,
-    this_faction: &str,
-    reactions: &mut Vec<(Entity, Reaction)>,
-) {
+fn evaluate(idx: usize, factions: &ReadStorage<Faction>, this_faction: &str, reactions: &mut Vec<(Entity, Reaction)>) {
     crate::spatial::for_each_tile_content(idx, |other_entity| {
         if let Some(faction) = factions.get(other_entity) {
             reactions.push((
diff --git a/src/ai/default_move_system.rs b/src/ai/default_move_system.rs
index deca1f1..f32f05f 100644
--- a/src/ai/default_move_system.rs
+++ b/src/ai/default_move_system.rs
@@ -85,7 +85,7 @@ impl<'a> System<'a> for DefaultAI {
                 Movement::RandomWaypoint { path } => {
                     if let Some(path) = path {
                         // We have a path - follow it
-                        let mut idx = map.xy_idx(pos.x, pos.y);
+                        let idx = map.xy_idx(pos.x, pos.y);
                         if path.len() > 1 {
                             if !crate::spatial::is_blocked(path[1] as usize) {
                                 pos.x = path[1] as i32 % map.width;
diff --git a/src/ai/visible_ai_system.rs b/src/ai/visible_ai_system.rs
index 0d2b762..61863ee 100644
--- a/src/ai/visible_ai_system.rs
+++ b/src/ai/visible_ai_system.rs
@@ -50,7 +50,7 @@ impl<'a> System<'a> for VisibleAI {
             for visible_tile in viewshed.visible_tiles.iter() {
                 let idx = map.xy_idx(visible_tile.x, visible_tile.y);
                 if this_idx != idx {
-                    evaluate(idx, &map, &factions, &faction.name, &mut reactions, None);
+                    evaluate(idx, &factions, &faction.name, &mut reactions, None);
                     idxs.insert(idx);
                 }
             }
@@ -61,7 +61,7 @@ impl<'a> System<'a> for VisibleAI {
                     // and it's not the idx we're standing on, then evaluate here w/ minds taken into
                     // account.
                     if this_idx != idx && idxs.contains(&idx) {
-                        evaluate(idx, &map, &factions, &faction.name, &mut reactions, Some(&minds));
+                        evaluate(idx, &factions, &faction.name, &mut reactions, Some(&minds));
                     }
                 }
             }
@@ -90,7 +90,6 @@ impl<'a> System<'a> for VisibleAI {
 
 fn evaluate(
     idx: usize,
-    map: &Map,
     factions: &ReadStorage<Faction>,
     this_faction: &str,
     reactions: &mut Vec<(usize, Reaction, Entity)>,
diff --git a/src/map/dungeon.rs b/src/map/dungeon.rs
index 6e3e0e9..9c2d84d 100644
--- a/src/map/dungeon.rs
+++ b/src/map/dungeon.rs
@@ -50,7 +50,7 @@ impl MasterDungeonMap {
     /// Gets a map by ID from the MasterDungeonMap
     pub fn get_map(&self, id: i32) -> Option<Map> {
         if self.maps.contains_key(&id) {
-            let mut result = self.maps[&id].clone();
+            let result = self.maps[&id].clone();
             return Some(result);
         } else {
             return None;
diff --git a/src/map/mod.rs b/src/map/mod.rs
index b943988..e40e0e8 100644
--- a/src/map/mod.rs
+++ b/src/map/mod.rs
@@ -1,6 +1,5 @@
 use rltk::{Algorithm2D, BaseMap, Point};
 use serde::{Deserialize, Serialize};
-use specs::prelude::*;
 use std::collections::HashSet;
 pub mod colours;
 mod glyphs;
diff --git a/src/map_indexing_system.rs b/src/map_indexing_system.rs
index d4ddf44..90ea6ec 100644
--- a/src/map_indexing_system.rs
+++ b/src/map_indexing_system.rs
@@ -4,10 +4,10 @@ use specs::prelude::*;
 pub struct MapIndexingSystem {}
 
 impl<'a> System<'a> for MapIndexingSystem {
-    type SystemData = (WriteExpect<'a, Map>, ReadStorage<'a, Position>, ReadStorage<'a, BlocksTile>, Entities<'a>);
+    type SystemData = (ReadExpect<'a, Map>, ReadStorage<'a, Position>, ReadStorage<'a, BlocksTile>, Entities<'a>);
 
     fn run(&mut self, data: Self::SystemData) {
-        let (mut map, position, blockers, entities) = data;
+        let (map, position, blockers, entities) = data;
 
         spatial::clear();
         spatial::populate_blocked_from_map(&*map);
diff --git a/src/spatial/mod.rs b/src/spatial/mod.rs
index 5708a8a..cbce0d8 100644
--- a/src/spatial/mod.rs
+++ b/src/spatial/mod.rs
@@ -141,7 +141,7 @@ pub fn move_entity(entity: Entity, moving_from: usize, moving_to: usize) {
     });
     lock.tile_content[moving_to].iter().for_each(|(_, blocks)| {
         if *blocks {
-            from_blocked = true;
+            to_blocked = true;
         }
     });
     lock.blocked[moving_from].1 = from_blocked;