NEW_COST in mtl_material_transactions diffirent ITEM_COST in cst_layer_cost_details

Help Issue:

We use Average cost Method with Cost Managerment.

Setp 1:

      Create Account alias receipt transaction :

      Transaction_quantity = 395.

      Transaction_cost = 14823668,7848101.

Step 2. Run Actual cost Worker.

Step 3. View DB

1 . In mtl_material_transactions :

       Transaction_quantity = 395.

     Actual_cost = 14823668,7848101

     Transaction_cost = 14823668,7848101.

      Prior_cost =0  

     NEW_COST=14823668,7848101

2. In mtl_cst_actual_cost_details :

     Actual_cost =14741000

     NEW_COST = 14741000

3. In cst_layer_cost_details

     ITEM_COST = 14741000

===> NEW_COST in mtl_material_transactions diffirent ITEM_COST  in cst_layer_cost_details

Help Please