Okay, now I feel like a dope. I figured out that one has to "specify import order" and then it works like it should. The name of the option was giving me pause. Maybe it would be more appropriately be named "specifiy fields to import" or some other more descriptive name. I was assuming sort order when I looked at it before.
We all have moments of euphoric clarity, and unfortunately the other end of the spectrum as well.
You only learn something like that once, and trust me, you'll never make that mistake again.
Glad you were able to figure it out!