check if you have empty tracks within your song. Example: Audio of your song is only on track 1, 3, 6 & 7 – leaving track 2, 4 & 5 empty. In this case uTrack24 skips empty tracks and uses settings from the empty tracks instead. So you end up with track 1 (and original setting of track 1), track 2 (originally track 3 but now with setting from track 2), track 3 (originally track 6 but now with setting from track 3) and track 4 (originally track 7 now with setting from track 4). So it squeezes all together leaving no empty tracks.
I was told that this behavior will be fixed in one of the next firmware release of uTrack24.
Workaround: fill empty tracks with few seconds of silence (so there is audio data) and it will work as expected