diff --git a/alakazam.py b/alakazam.py
index f1fde32..f727c1a 100755
--- a/alakazam.py
+++ b/alakazam.py
@@ -66,14 +66,19 @@ def get_value(dict, *keys):
     return _element
 
 
-def merge_dict(dict1, dict2):
+def merge_dict(dict1, dict2, reverse_list_order=False):
     """ Merge two nested dicts recursively, the second overwrites the first one"""
     merged_dict = dict1.copy()
     for key, value in dict2.items():
         if key in merged_dict and isinstance(value, dict) and isinstance(merged_dict[key], dict):
-            merged_dict[key] = merge_dict(merged_dict[key], value)
+            merged_dict[key] = merge_dict(merged_dict[key], value, reverse_list_order)
         elif key in merged_dict and isinstance(value, list) and isinstance(merged_dict[key], list):
-            merged_dict[key] = list(set(value + merged_dict[key]))
+            if reverse_list_order:
+                merged_list = value + merged_dict[key]
+            else:
+                merged_list = merged_dict[key] + value
+            unique_list = list(dict.fromkeys(merged_list)) # remove duplicates
+            merged_dict[key] = unique_list
         else:
             merged_dict[key] = value
     return merged_dict
@@ -156,7 +161,7 @@ def merge_connection_configs(configs):
         for target_app, source_apps in connection_config.items():
             for source_app, target_conf in source_apps.items():
                 if target_app in instance_config and source_app in instance_config:
-                    instance_config[target_app] = merge_dict(target_conf, instance_config[target_app])
+                    instance_config[target_app] = merge_dict(target_conf, instance_config[target_app], reverse_list_order=True)
     return merged_configs