Excellent progress going from 29% to 22%! Of course your weight has gone up, because you've been replacing fat with muscle. For awhile it might seem like your butt is getting bigger, that's just because you can't lose fat and add muscle at exactly the same rate. If you keep lowering your bodyfat though, your butt and legs will get smaller. Sometimes it will seem like you're losing fat everywhere except your butt, at least that's how I felt.
As you continue to add muscle, you'll be able to burn even more fat, so DON'T try to add more cardio and do less weights in an attempt to burn more fat. You want to keep building muscle. A pound of muscle takes up a lot less space than a pound of fat. This takes time.
If you say your eating is "pretty good", then your diet could probably use some improvement. All the weight training and cardio in the world will NOT make up for a lousy diet. You don't have to drastically change your diet all at once, but challenge yourself to make some positive changes each week. It will help you in your workouts and your results will come more quickly.
You could also try a fat burner like Adipokinetix. For me, that one seemed to target the butt and thigh fat the best.