diff --git a/chromebook-checkout-meteor/client/admin.js b/chromebook-checkout-meteor/client/admin.js
index 77f1f6e..940e0b7 100644
--- a/chromebook-checkout-meteor/client/admin.js
+++ b/chromebook-checkout-meteor/client/admin.js
@@ -37,8 +37,8 @@ Template.admin.events({
     }
     if(currSerials.length !== 0) {
       alert("That serial number already exists!");
-       $("input[name='aserial']")[0].value = "";
-        $("input[name='aserial']").focus();
+      $("input[name='aserial']")[0].value = "";
+      $("input[name='aserial']").focus();
       throw new Error("That serial number already exists!");  
     }
 
@@ -63,6 +63,14 @@ Template.admin.events({
     event.preventDefault();
 
     var cart_number = $("input[name='acnumber']")[0].value;
+    var currCName = carts.find({ number: cart_number }).fetch()
+
+    if(currCName.length !== 0) {
+      alert("That cart already exists!");
+      $("input[name='acnumber']")[0].value = "";
+      $("input[name='acnumber']").focus();
+      throw new Error("That cart already exists!");
+    }
 
     if (!((cart_number === "")))
 
diff --git a/chromebook-checkout-meteor/client/tabs.css b/chromebook-checkout-meteor/client/tabs.css
index c2a8fd5..0d59b32 100644
--- a/chromebook-checkout-meteor/client/tabs.css
+++ b/chromebook-checkout-meteor/client/tabs.css
@@ -8,20 +8,27 @@
   font-weight: 600;
   font-size: 13px;
   float: left;
-  padding: 13px 23.18%;
-  margin: 0;
+  padding: 13px 23.24%;
+  border-bottom: 5px solid #ddd;
   list-style: none;
   cursor: pointer;
   margin-bottom:3%;
+  transition: background-color 0.4s;
+  transition: border-bottom 0.4s  
 }
 .tab-item.active {
-  border-radius: top 5px;
-  border: 1px solid #ddd;
-  border-bottom: none;
+  border-bottom: 5px solid #E14C2B;
   margin-bottom: -1px !important;
-  padding: 13px 23.15% 14px 23.15% !important;
+  box-shadow: inset 1px 1px 1px #ddd;
+  background-color: #fff;
+}
+.tab-item:hover {
+  background-color: rgba(212, 212, 212, .7);
+  border-bottom: 5px solid rgba(225, 76, 43, .5);
+}
+.tab-item.active:hover {
+  border-bottom: 5px solid #E14C2B;
   background-color: #fff;
-  color: #333;
 }
 .tabs-content-container {
   padding: 4.2% 15px 15px 15px;