Laura, you cannot expect to maintain your loss on that few calories at all, especially since you workout so hard. That is just silly woman, you know better.
I worked with a guy who trains the fitness competitors. He is an expert at exercise and nutrition, I went from 18 percent bodyfat to 13 percent in 12 weeks, nope did not maintain 13 percent, 18 percent is perfect for me actually, I just wanted to prove to myself I could do it at my "old age", I am 42. Here is his web site.
www.bodybyo.com
His name is Kim...I did the 12 week transformation plan. I was eating at least 1,600 calories a day.