To me, it looks like, the further you are from your goal weight the more pounds you gain back by introducing carbs back into a low carb diet.
I was strictly low carb since May, lost about 20 lbs, then stalled for 3 months at 160. I really lost motivation in low carbing and began to eat bad carbs again. (fast food, snack foods, fried shrimp, sweets) I didn't gain a pound and just stayed at 160, however, I did feel sluggish and upset with myself for straying. So after 2 weeks of that I decided to go back to 15-20 net carbs a day. Within 48 hours I dropped 3 pounds.
Honestly, I don't see a problem with what I did because it seemed to get me back on track. I took it as a learning experience. Some people (especially on this board) are very conservative when it comes to low carb, and frown at "cheating".
Do what feels right for you. You'll know if your are not happy with the decisions you make about what your are putting into your body. If its wrong, then stop and try something else.
p.s. I have just found the greatest little low carb shop here in Memphis. They carry zero carb breads, pitas, and bagels. Not sure how good they are, but I had a turkey and ham wrap today the owner prepared that was absolutely wonderful. The bread had the best texture (better than regular bread), in my opinion. Plus, alot of stuff imported from the middle east. Apparently, most of the ingredients used in middle eastern dishes are low carb from what I gathered from the owner.
Now I am all excited because I am going to be learning new ways of preparing my food. That is what makes low carb appealing to me. Its a completely new way of eating altogether.
Good luck to you!