diff --git a/common/envs/constants.ts b/common/envs/constants.ts
index 3fac56df..7092d711 100644
--- a/common/envs/constants.ts
+++ b/common/envs/constants.ts
@@ -36,7 +36,7 @@ export const CORS_ORIGIN_MANIFOLD = new RegExp(
 )
 // Vercel deployments, used for testing.
 export const CORS_ORIGIN_VERCEL = new RegExp(
-  '^https?://(?:[a-zA-Z0-9\\-]+\\.)*' + escapeRegExp('vercel.app') + '$'
+  '^https?://[a-zA-Z0-9\\-]+' + escapeRegExp('mantic.vercel.app') + '$'
 )
 // Any localhost server on any port
 export const CORS_ORIGIN_LOCALHOST = /^http:\/\/localhost:\d+$/
diff --git a/common/new-bet.ts b/common/new-bet.ts
index 541b8afe..719a6533 100644
--- a/common/new-bet.ts
+++ b/common/new-bet.ts
@@ -168,8 +168,6 @@ export const getBinaryCpmmBetInfo = (
 
     const { taker, maker } = fill
 
-    amount -= taker.amount
-
     if (maker.matchedBetId === null) {
       // Matched against pool.
       cpmmState = maker.state
@@ -182,6 +180,8 @@ export const getBinaryCpmmBetInfo = (
       i++
     }
 
+    amount -= taker.amount
+
     if (floatingEqual(amount, 0)) break
   }