main time signature issue got fixed so it's just minor things at this point (please bear with me sorry)
the two bars from 01:42:797 - to 01:45:464 - are 4/4, evident in the rhythmic structure changing from the previous part
for the slowdown part it looks like you did half of the fix so there's currently two barlines at 03:20:463 - and 03:20:797 - so i'd suggest removing the second. it looks like you also deleted a timing point somewhere so that there's no longer a barline at 03:24:056 - ? not too big of a deal, but i'd suggest removing the line at 03:24:462 - since it's not a downbeat (correlates with 03:35:130 (34) - this note, which clearly isn't a downbeat)
didn't notice this the first time around but 04:40:129 - to 04:42:795 - is actually also two 4/4 bars, so you'd have to 1) delete the timing point @ 04:40:129 - , 2) move the one @ 04:42:462 - to 04:42:795 - , then 3) set the point @ 04:43:211 - to omit first barline
feel free to corroborate with qats
thanks for putting up with my posts lol, multi time signature stuff is my favorite so i'm just trying to help out the best i can