Quantity of an item in Debug mode is different when compared to the quantity in Preview configuratio

Hi,

We have few items that are providing a different quantity value when we try to test the model in Debugging Mode VS testing the model using UI.

Our Model structure:

ATO MODEL

        ATO OC

                Item 1 [ Properties: model = A, Option1= 2,  Option2 = 3, Option3 = 4 ]

                Item 2 [ Properties: model = B, Option1= 3,  Option2 =4,  Option3 = 5 ]

                Item 3 [ Properties: model = C, Option1= 4,  Option2 = 5, Option3 = 6 ]

  Non Bom - Guided Selling

          Model Option Calss

                   A

                   B

                   C

          Option Qty

                      Option1

                      Option2

                      Option3

           Additional Option Qty

                     AD1

                     AD2

                     AD3       

We have a PBC rule at the ATO OC.  If the item has property that matches to the options in the Model Option class, there is a default rule that  selects all the items, For ex when A is select by Default ITEM A is selected (bcos itemA has property model = A). We have a PBC Contribute rule, for all the items that are selected, based on option Qty select, contribute their corresponding value to the item.