i think it´s both actually!?
i don´t think there is anything wrong with the midi files, though!?
if i start moving those blocks around it happens every now and then!
if you want to try and make this happen, here´s what i did:
as i wrote about in another post, i´m having problems setting ezkeys to halfspeed (another post and another problem), so i decided to try to solve this by setting the tempo to half the size and cut every single block of the song in half!
after this was done, i had a song full of empty spaces between every block!
so i moved every block manually, to make them connect with the previous block and when that was done and i scrolled through the song to check if everything looked ok, i noticed these problems of several blocks that weren´t connected!
here is a screenshot, showing a small, but still visible gap, in the bottom row, where the red line points to!
and here is that actual gap (follow the red line), showing that the blocks are not connected as they should and the c chord is not lined up with the grid of the timeline!
compare it to the surrounding blocks that are clearly connected properly!
this is not a “one time issue”!
during this song, even though it strangly shows only one gap in the bottom row, as shown in the first image, i just worked with it and i had to manually correct about 20-30 of those kind of gaps, by dragging them slightly, until they connected to the following block!
