it definitely looks like different tempos in each track. Since 3mle applies the tempo change globally to tracks, it looks fine there, but in maple, it is not applied globally, so you would need to make sure all the tempos are inputted for each track. From what i can see, track1 starts off at tempo of 120 (denoted by t120), but i have no clue what the other tracks 2-9 have. Judging from the second screenshot in maple, the other tracks do not have the same tempo of 120. The same note at different tempo are not the same thing, as you can see in the second screenshot.