Saraiks,
Your self-diagnosis is pretty good. The tabs have gotten your CYA up there where managing your water can be difficult. (although it seems like you're doing pretty well with clear pool water and an FC of 7.5)
Draining some out and refilling may be a pain now but probably beneficial in a number of ways for the future. It should also help reduce your CH......not a bad idea, either. BTW, have you been using Calcium Hypochlorite either to shock or for some of your FC? That would explain the high CH.
As Jason said, the CYA is your biggest issue.......requiring even more FC than you currently have. A 50% drain and refill may get all of your numbers back into a more manageable category.
CC's of .5 or less are pretty common in many pools.....it's typically when they get to 1.0 or more that you need to pay attention.