U have improved quite a bit in your paintings. Colors are better and your paintings aren't as blotchy as they where when u first started, but it stills seems to be a problem. I'm not sure how much time your spending on them, but it also seems like you keep going down this narrow path of low opacity mixing/over mixing of colors aka it seems like your letting the program mix the colors for you rather than u actually picking them.
Try doing some quick block ins with like what you've been doing then switch over to pure opacity.
and I'll post my crap sometime so you can tell me all my faults too!