Hey man I just went through the same thing. I had to take about 6 months away from athletics and came back considerably bigger (25-30 pounds, don't ask me how). Six months into my training, I was still TOTALLY stuck with 10 of those extra pounds. My training was going well, workouts were almost as good as they used to be, but the weight never would leave.
Eventually though, it did go away and did so without my having done anything "extra" (as if running 80mpw is normal...). Anyways, just keep doing your training and your physique will improve to what you know it should look like. Don't do anything drastic (diet changes, bump in mileage)...it'll come in time.
Also, when my last few pounds disappeared, I saw only marginal improvement in my workouts, which leads me to believe that the improvement was solely due to the consistent training, not necessarily the weight. However, there is definitely a mental gain when you "look" fitter.
Fare well man, and don't sweat the baby fat.