I also fell foul of this having bought the uTrack-X32 on the back of looking at the uRemote demo. I have been very disappointed at only being able to record all 32 tracks at once when I only needed eight. The X32 Card Configuration also seemed to show various different track settings but none of them made any difference. I had to revert to just using the uTrack as a USB interface and record to a DAW on a laptop.
It would have helped if you could select which tracks to import out of the 32 recorded when using the uControl app to export the audio. I didn’t want 24 files of silence taking up space on my hard drive.