I have a trip coming up next Monday

CVG-FRA-AMS-PEK-SZX...HKG-NRT-SEA-CVG

I paid the Y fare (which for several legs was cheaper than the M fare...go figure) and used SWU's...upgrades available on all legs that they can be offered on.

DL put me in the correct cabin on each segment, but DL.com won't let any of my seat selections stick.

I like the upper deck on the KLM flight AMS-PEK, and I select the seat, pick "Save and Exit" but then it kicks me back to row 5 on the lower deck every time. And it's not an exit row issue, although I tried the exit row in upper deck and answered the standard questions, but that didn't stick either.

Even the NRT-SEA won't let me stick with Row 1 on the 333. The seats all show open...

Any suggestions? Other than a call to DL, which will likely be my next step.

J