Congratulations on finding this website. You definitely have some great tools here for assisting you in learning to eat right. And congratulations on "recovering". Having eating disorders is no walk in the park.
I have no experience as such with bulimics, but I don't really think there is such a think as not digesting calories right. I can not think of how it could be possible to gain MORE fat from the same calories. I I can't see how this could happen.
I think that the issue could be to track the calories right, and to maintain an active life style to match it.
I think for you, the right thing to be doing would be to count all your food intake, and count all your exercise, and on a daily basis try to be at 500-1000 calories more burnt than consumed.
This should get you going.
Also, since you have a past with eating disorders, I would make sure that you are as recovered as it is possible, and that you are in a mentally good place to do this. Being happy while losing weight significantly ups the success rate.
Again, I am no expert on this - this is only my thoughts on the issue. I hope you find a little help in it, and that you will have a happy, onwards journey. Feel free to add me as a buddy, should you like to.
"Losing weight is never about eating as little as possible"
"Eating enough, moving more, not eating stupid s**t = losing weight."
"Do. Or do not. There is no trying."
- Master Yoda.
I started my weight loss journey on October 4th, 2010 - and this is what I have accomplished so far: