I was mirroring the screenshot you sent me.
This one.
But now the filter should look at sales rep id?
Why are you saying Sales Rep ID is Name?
Whoa, i think you nailed it Tyler. I just imported two new test customers with different sales rep id and they correctly mapped to the sales rep names.
Im going to test a couple more scenarios, but so far so good!

Yeah, we imported a couple more new customers and the logic is working! I think we can close this ticket for now.
We now have to do something similar with a new Item FTP file that will contain new Items. So i may start a new thread for that one if needed.
I truly appreciate everyone's help and patience!