diff --git a/src/data/layers/elves.tsx b/src/data/layers/elves.tsx
index fd3330d..b0ebe72 100644
--- a/src/data/layers/elves.tsx
+++ b/src/data/layers/elves.tsx
@@ -1333,7 +1333,7 @@ const layer = createLayer(id, function (this: BaseLayer) {
             },
             packingElf: {
                 buyProgress: persistent<DecimalSource>(0),
-                amountOftimesDone: persistent<number>(0),
+                amountOfTimesDone: persistent<number>(0),
                 bought: persistent<boolean>(false)
             }
         },
diff --git a/src/data/projEntry.tsx b/src/data/projEntry.tsx
index 1906342..77fa994 100644
--- a/src/data/projEntry.tsx
+++ b/src/data/projEntry.tsx
@@ -14,10 +14,10 @@ import type { PlayerData } from "game/player";
 import player from "game/player";
 import { format, formatTime } from "util/bignum";
 import { Computable, convertComputable, ProcessedComputable } from "util/computed";
-import { createLazyProxy } from "util/proxies";
+import { createLazyProxy, ProxyState } from "util/proxies";
 import { save } from "util/save";
 import { render, renderRow, VueFeature } from "util/vue";
-import { computed, Ref, ref, unref, watchEffect } from "vue";
+import { computed, isReadonly, isRef, Ref, ref, unref, watchEffect } from "vue";
 import "./advent.css";
 import { credits } from "./credits";
 import Day from "./Day.vue";
@@ -209,7 +209,7 @@ export const main = createLayer("main", function (this: BaseLayer) {
             management,
             letters
         ]) {
-            swapMastery(layer.mastery, layer);
+            swapMastery(layer.mastery, layer[ProxyState]);
         }
 
         swappingMastery.value = false;
@@ -217,6 +217,10 @@ export const main = createLayer("main", function (this: BaseLayer) {
     function swapMastery(mastery: Record<string, any>, layer: Record<string, any>) {
         for (const key of Object.keys(mastery)) {
             if (isPersistent(mastery[key])) {
+                if (!isRef(layer[key]) || isReadonly(layer[key])) {
+                    console.error("Something went wrong swapping state", key, layer, mastery);
+                    continue;
+                }
                 [mastery[key].value, layer[key].value] = [layer[key].value, mastery[key].value];
             } else {
                 swapMastery(mastery[key], layer[key]);
diff --git a/src/game/layers.tsx b/src/game/layers.tsx
index c689235..dbaf40e 100644
--- a/src/game/layers.tsx
+++ b/src/game/layers.tsx
@@ -20,7 +20,7 @@ import type {
     ProcessedComputable
 } from "util/computed";
 import { processComputable } from "util/computed";
-import { createLazyProxy } from "util/proxies";
+import { createLazyProxy, ProxyState } from "util/proxies";
 import { computed, InjectionKey, Ref } from "vue";
 import { ref, shallowReactive, unref } from "vue";
 
@@ -206,7 +206,7 @@ export const addingLayers: string[] = [];
 export function createLayer<T extends LayerOptions>(
     id: string,
     optionsFunc: OptionsFunc<T, BaseLayer>
-): Layer<T> {
+): Layer<T> & { [ProxyState]: Layer<T> } {
     return createLazyProxy(() => {
         const layer = {} as T & Partial<BaseLayer>;
         const emitter = (layer.emitter = createNanoEvents<LayerEvents>());
diff --git a/src/util/break_eternity.ts b/src/util/break_eternity.ts
index a8d83e3..fc76d62 100644
--- a/src/util/break_eternity.ts
+++ b/src/util/break_eternity.ts
@@ -217,7 +217,7 @@ export function formatGain(gain: DecimalSource) {
         [-1]: `${format(gain)}/s`,
         0: "",
         1: `+${format(gain)}/s`
-    }[Decimal.compare(gain, 0)];
+    }[Decimal.compare_tolerance(gain, 0, 0.001)];
 }
 
 export function formatList(list: string[]) {
diff --git a/src/util/proxies.ts b/src/util/proxies.ts
index 9dad138..19c827c 100644
--- a/src/util/proxies.ts
+++ b/src/util/proxies.ts
@@ -21,7 +21,7 @@ export type ProxiedWithState<T> = NonNullable<T> extends Record<PropertyKey, any
 export function createLazyProxy<T extends object, S extends T>(
     objectFunc: (baseObject: S) => T & S,
     baseObject: S = {} as S
-): T {
+): T & { [ProxyState]: T } {
     const obj: S & Partial<T> = baseObject;
     let calculated = false;
     function calculateObj(): T {
@@ -66,5 +66,5 @@ export function createLazyProxy<T extends object, S extends T>(
             }
             return Object.getOwnPropertyDescriptor(target, key);
         }
-    }) as S & T;
+    }) as S & T & { [ProxyState]: T };
 }