I'm close to finish the first season and I've just noticed both Reserves and U21s play close to 80 matches in their respective leagues. My guess is that, since the main team plays 4 rounds in a group of just 5 teams, somehow that mechanic replicated in the other tournaments and both Reserves and U21s also go 4 rounds

Oh yeah of course. I do an other version soon.

This is a small issue, but is there any way for you to make it a 2 part season like real life? I see you have done that for the other leagues in central america but not this one. If not that is ok and I greatly appreciate the work you do!