Actually I think ten pounds is rather normal and shows that you are getting results. I'm not a fitness expert, but may I suggest adding some strength training to your workout regimen?
You don't have to train like a body builder either. Just do a few repetitions on various muscle groups, build them up and get them stronger.
While cardio exercises do burn fat, the benefit of having muscle is that it helps to increase your metabolism. If you've ever wondered why some people eat anything and not gain a pound, it's because of their high metabolism.
A good strength training workout followed by some cardio and healthy eating habits are a good way to increase the burn. Make sure that you are eating enough and drinking lots of water too.
There are some natural fat burning foods that you can also try. I can't remember off hand, but there are lots of websites that list them. Hope this helps.