Inconsistency between two 9879 builds

[jpopowski1]

I have a development system and a production system who both claim to be build 9879. The CommerceBuilder.dll is the same size and date (6/23) on both. However, in the ProductDialog.ascx (which has been customized), one requires an optionList in this statement

inv = InventoryManager.CheckStock(_ProductId, optionList, _SelectedKitProducts);

and one requires a productVariantId.

Doing help/about in the dashboard produces an identical list.

Can anyone guide me on where to look next for the difference? Looking at the InventoryManager source code it seems that the optionList agrees with source for 7.0. However, the production system is supposedly running 7.0 and using productVariantId .

[jmestep]

There is a BuyProductDialogOptionList.ascx also. Maybe yours was renamed or something?