WHAT A GREAT JOB!!!
I wouldn't sweat the lower marks in the flat classes. It all depends on if they were equitation classes or something else like Hunters Under Saddle because if you were in anything but EQ, the judge was also basing on what horse they liked etc etc. Some judges also let their personal preferences get in the way so it could have also been a matter of that. I've seen many people get blues ALL the time and then they go to one show and that judge for some reason didn't like what they saw and they would get bottom of each class the whole show. It's disappointing as heck, but it can happen.
Just keep working at it, keep going, and keep having fun!! I envy you...I won't get to show Cin until probably next spring at the soonest...yikes I could just imagine us in a show ring now ha ha ha ha ha. We'd probably be dismissed after like 5 seconds ha ha!