diff --git a/multi_user/__init__.py b/multi_user/__init__.py
index 6d54b40..cd163d5 100644
--- a/multi_user/__init__.py
+++ b/multi_user/__init__.py
@@ -31,7 +31,7 @@ DEPENDENCIES = {
 
 
 logger = logging.getLogger(__name__)
-logger.setLevel(logging.ERROR)
+logger.setLevel(logging.INFO)
 
 #TODO: refactor config 
 # UTILITY FUNCTIONS
diff --git a/multi_user/bl_types/bl_collection.py b/multi_user/bl_types/bl_collection.py
index 3de8af0..fbf9383 100644
--- a/multi_user/bl_types/bl_collection.py
+++ b/multi_user/bl_types/bl_collection.py
@@ -33,9 +33,8 @@ class BlCollection(BlDatablock):
 
         for collection in target.children:
             if collection.uuid not in data["children"]:
-                target.collection.children.unlink(collection)
+                    target.children.unlink(collection)
 
-        utils.dump_anything.load(target, data)
 
     def dump(self, pointer=None):
         assert(pointer)
@@ -45,6 +44,7 @@ class BlCollection(BlDatablock):
         # dump objects
         collection_objects = []
         for object in pointer.objects:
+                if object not in collection_objects:
             collection_objects.append(object.uuid)
         
         data['objects'] = collection_objects
@@ -52,6 +52,7 @@ class BlCollection(BlDatablock):
         # dump children collections
         collection_children = []
         for child in pointer.children:
+                if child not in collection_children:
             collection_children.append(child.uuid)
         
         data['children'] = collection_children
diff --git a/multi_user/bl_types/bl_user.py b/multi_user/bl_types/bl_user.py
index 1f29deb..5092cf6 100644
--- a/multi_user/bl_types/bl_user.py
+++ b/multi_user/bl_types/bl_user.py
@@ -1,5 +1,6 @@
 import bpy
 import mathutils
+import jsondiff
 
 from .. import utils
 from .. import presence
@@ -18,8 +19,8 @@ class BlUser(BlDatablock):
     
     def apply(self):
         # super().apply()
-    #     self.data = jsondiff.patch(self.data, self.modifications, marshal=True)
-    #     self.modifications = None
+        self.data = jsondiff.patch(self.data, self.modifications, marshal=True)
+        self.modifications = None
         
         if self.pointer:
             self.load(data=self.data, target=self.pointer)
diff --git a/multi_user/environment.py b/multi_user/environment.py
index 937c8c5..8b5b7ca 100644
--- a/multi_user/environment.py
+++ b/multi_user/environment.py
@@ -6,7 +6,7 @@ import sys
 from pathlib import Path
 
 logger = logging.getLogger(__name__)
-logger.setLevel(logging.ERROR)
+logger.setLevel(logging.INFO)
 
 CONFIG_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)), "config")
 CONFIG = os.path.join(CONFIG_DIR, "app.yaml")
diff --git a/multi_user/libs/replication b/multi_user/libs/replication
index 5f0beee..307de6f 160000
--- a/multi_user/libs/replication
+++ b/multi_user/libs/replication
@@ -1 +1 @@
-Subproject commit 5f0beee7b8123aad673326bed83d10106d5346b3
+Subproject commit 307de6fdcfd501a4004516fd6495eefb3fca9b0f
diff --git a/multi_user/operators.py b/multi_user/operators.py
index a238372..abb468e 100644
--- a/multi_user/operators.py
+++ b/multi_user/operators.py
@@ -22,7 +22,7 @@ from .libs.replication.replication.exception import NonAuthorizedOperationError
 from .libs.replication.replication.interface import Session
 
 logger = logging.getLogger(__name__)
-logger.setLevel(logging.ERROR)
+logger.setLevel(logging.INFO)
 
 client = None
 delayables = []
@@ -74,7 +74,7 @@ class SessionStartOperator(bpy.types.Operator):
             bpy_factory.register_type(
                 _type.bl_class,
                 _type.bl_rep_class,
-                timer=type_local_config.bl_delay_refresh,
+                timer=0,#type_local_config.bl_delay_refresh
                 automatic=type_local_config.auto_push)
 
             if type_local_config.bl_delay_apply > 0:
@@ -303,7 +303,7 @@ class SessionCommit(bpy.types.Operator):
 
     def execute(self, context):
         global client
-
+        # client.get(uuid=target).diff()
         client.commit(uuid=self.target)
         client.push(self.target)
         return {"FINISHED"}
diff --git a/multi_user/utils.py b/multi_user/utils.py
index 8e5f051..2209a90 100644
--- a/multi_user/utils.py
+++ b/multi_user/utils.py
@@ -13,7 +13,7 @@ from . import environment, presence
 from .libs import dump_anything
 
 logger = logging.getLogger(__name__)
-logger.setLevel(logging.ERROR)
+logger.setLevel(logging.INFO)
 
 
 def find_from_attr(attr_name, attr_value, list):