Is there some filtering going on for times shorter than expected?
I happened to find a cut in DeJay (great track BTW), which gave me a time of 29.01s, considerably shorter than the 35s typical time but it can't be uploaded, giving the message "Your best time does not qualify for submission."
As it happens the checkpoints were taken in the correct order, although one was in the reverse direction.
TM has always treated cuts (or indeed taking the checkpoints in any order) as being acceptable (older readers may remember the original TM track where the quickest time was to reverse off the start line), and authors will then update the track accordingly.