You might have to zig zag your diet to figure out how many calories is optimum for your exercise program. You could definitely be in a calorie deficit with what your eating. After doing that for too long your bodies natural reaction is to store fat. I'm no nutritionist but I would say to add in more...

Everyone would have that perfect 6 pack if it worked.

I can tell you this, getting that 6 pack is no easy task. I have been trying to drop that last 2% of fat and its tough.