In most women, fat comes off the butt and thighs last. And you're holding on to fluid, too. I was just
reading this from the John Hussman site earlier:
If you've been lifting weights, you'll also be adding to muscle mass while you lose fat. The muscles become able to store more glycogen, and every gram of glycogen binds itself to several grams of water within the muscle, so a "pumped" muscle is heavier. Regular exercise also increases blood volume. And since protein synthesis typically goes along with increased cell volume (especially if you're using creatine and glutamine), the scale will be an awful measure of the improvements that are going on metabolically. It's ironic - cell volume, blood volume - exactly the things that will be helping you to get fit, can be the things that initially make you think you're making no progress.
You should check out the rest of the article. It talks about how you're changing your body from the inside out. Keep it up. Have faith.