Has your total body weight changed? To lose weight, you have to eat fewer calories than your burn off in exercise. You need to keep a log of everything you eat every day and compare that to a log of workouts. Most likely you're not burning off more than you're eating.

You need to do longer aerobic training, at least 2-3 hours a day at least 2x per week. The kinds of workouts you're doing may be OK for strength building, but to burn off lots of calories per day, you need to do longer endurance workouts at a high calorie/hr pace. That means just below your LT for hours at a time. A half-hour is simpy warmup!

To lose fat, but not destroy good muscle-tissue at the same time, you have to eat enough carbs to burn for energy. Burning fat can ONLY occur at the same time as burning carbs. If you run out of carbs, your body will turn to burning muscle-protein instead and all fat-burning pretty much stops. You can actually lose weight AND increase your body-fat% at the same time !