Transfer Order Question: A few transfer orders were set up without the "Use Item Cost as Transfer Cost" checkbox checked and are already received. We cannot go in and check that box after the fact, what is the best solution for us to ensure the valuation is maintained?

This happened to me as well. If you aren't able to delete/recreate transactions, then you could check out the Inventory Cost Revaluation record type. Prerequisite: Standard Costing enabled. Then can be turned on in Enable Features. Another would be the Inventory Worksheet, but you lose LIFO/FIFO if you have that implemented.