Wow not a good informative response in the bunch. Um... Did you feed her right after she laid the first clutch?? (That should have been the first thing asked here.) If so this has a great deal to do with doubling. If she has good condition going in and then you feed her right after she lays she will likely at least ovulate again. For a first year animal I would have not fed until after her shed and then only a small meal like a fuzzy to prevent the second clutch. It is too much stress on her body to double so young. Not impossible or anything, just stressful.
Think of it this way. The only goal for that snake is to reproduce more of its kind. If it is a good year, with lots of food, then it is better to reproduce more if you can. You feeding the snake right after she lays (if you did) means it is a good year for food. She will produce more eggs at that point even if it weakens her so much that she can't reproduce next year. Why?? Because this year there is food, who knows about next year. Feast or famine. I am not suggesting any thought goes into this on the snakes part, it is just what they do. If you want to test it, feed the crap out of her after this clutch, if it comes, and she will triple clutch!!
A snake that young is going to be a little shy on calcium from growing still and shelling the eggs. A second clutch is going to pull even more. At the very least, at this point you should supplement her diet with more calcium. Don't over do it but add some in. After this clutch (if it comes) wait until she sheds and then offer a fuzzy, wait at least ten days and give another fuzzy. That should be about 20 plus days and then you can go to a mouse and then back to regular feeding without a third clutch.
I personally try to wait until the second or third breeding season before I push multiple clutches, if I do at all. You can easily do it at any time and if you pay attention to your snake you can even see them carrying ova at odd times from your feeding regimen. The goal should be to lower stress levels first and get eggs second. It is only my opinion that you should wait until later to multi clutch, others may disagree.
Lastly I am in no way saying you have done anything wrong, in fact you have been trying to do things that you are told right out of the books. They tell you to be feeding the snake as soon as the eggs are pulled. Just remember that most of our books have been written by commercial breeders, and their goal is to get as many eggs as possible. If that is your goal, great, good job. If it is to give housing with the least stress possible then those are not the books to follow to the tee. Some of the info is golden but other info is a little a off. Just a little food for thought. If I am totally off I apologize.
Oh yeah, at this point through in a male cuz the eggs are coming either way, might as well be fertilized.
Jason