diff --git a/couchpotato/core/helpers/variable.py b/couchpotato/core/helpers/variable.py
index f38cf39c..53b71941 100644
--- a/couchpotato/core/helpers/variable.py
+++ b/couchpotato/core/helpers/variable.py
@@ -36,10 +36,18 @@ def mergeDicts(a, b):
                     stack.append((current_dst[key], current_src[key]))
                 elif isinstance(current_src[key], list) and isinstance(current_dst[key], list):
                     current_dst[key].extend(current_src[key])
+                    current_dst[key] = removeListDuplicates(current_dst[key])
                 else:
                     current_dst[key] = current_src[key]
     return dst
 
+def removeListDuplicates(seq):
+    checked = []
+    for e in seq:
+        if e not in checked:
+            checked.append(e)
+    return checked
+
 def flattenList(l):
     if isinstance(l, list):
         return sum(map(flattenList, l))