Supplier Price List not populating subcontract PO's properly

I’ve checked every possible thing I can think of, but our prices are not consistently being populated by supplier price list data. Even when date range is valid, op description and supplier match, for some reason, prices are coming in from “elsewhere”.

Can someone out there offer some assistance as to why this might not work properly?

You’ve probably checked already but just in case you haven’t, is the pricing consistently on the Subcontract tab and not the Part tab in the Supplier Price List?

Yes, it is. We don’t use Supplier Price List for anything but subcontract. We have essentially no entries on the Part tab of Supplier Price List.