Import Scenario detail record not reading master record

I am writing an Import Scenario to import customer x-ref data to a stock item.

To InventoryItem, our VAR added UsrUPC so we can get the UPC from the stock item record, with less logic.

Ideally, I want to use the UPC and Description, if there is one in the import file, if not inherit it from the InventoryItem row.

No matter what, I was getting empty fields for those two columns. So, for testing I stripped it down to just set those two columns to Item.UsrUPC and Item.Descr. Then when that works, add functionality to pull from the file.

My import scenario is fully functional, except where it is pulling Item.UsrUPC and Item.Descr.

Here is my import scenario:

Any ideas why it is not pulling Item.Descr and Item.UsrUPC?