There are no errors in ther repaint kit. The rest is up to the painters.
We inspect the free liveries before upload and list major flaws in the livery description.
With comments on a particular free livery you should contact a painter directly.

That's correct just detail accountability, it's up to the painters to look into that base on real airline configuration. Right now all these talented painters are just doing the livery color, they don't pay attention to the cabin doors, fuselage markers (cut here in case of emergency) and wing texture (black line on top of wings). These are just number of detailing that is different from other aircraft variance. It's also important that they upload all their work on ACE, so it can be updated with features like antennas/sat domes to make it more realistic base on airline config.