Surly73: A couple of questions come to my mind:
1/ How much did you take out? That should be a guide as to what's reasonable to put back in unless your level was way off.
Sadly, I didn't think to measure until after I realized I'd mixed it with some old engine oil.
2/ As another "check of reasonableness" (not a word, I know) the FCP Euro kit at includes 7L of fluid. If you were closer to 5L put in that might be reasonable. If I were FCP, I would assemble the kit with some room for error and spills.
So, something else I realized was that I only received 6 bottles. I also JUST read reviews on the kit I purchased page, and the 2 reviewers said they only drained/needed 5 liters https://www.fcpeuro.com/products/bmw...2901kt#reviews
3/ This document is straight from ZF - not sure if this was the one you were using. You'll notice the flow chart says "D1 and D2".
https://www.zf.com/global/media/medi...P_50130_EN.pdf
That was NOT the one I was using, but thanks a lot for that...seems like I did enough then!
4/ Was the car free-wheeling in the air or parked wheels down on a lift or something. You cannot access any gears other than M1 and M2 when stationary because you cannot launch from a start higher than 2. If the drivetrain isn't spinning up like you're on the road, the same behaviour should apply. I wouldn't be concerned about that.
Parked, wheels down. Makes sense...in my panic, I didn't think about that.
5/ I'm planning to get xHP too
Hope you're liking it.
I am! xHP was part of the reason I made sure to do this drain/fill! I don't "need" to be in Sport mode anymore. 
6/ Found a document on TIS which says total capacity is 8.5L. To me, that seems low, but I'm not sure what else to say. If you've changed over half just by dropping the pan, that sounds good.
https://www.newtis.info/tisv2/a/en/f...ssion/CNF80BK6
Thanks a bunch man, I really appreciate the feedback and assistance! 