I'm going to go ahead and add my mantra in, because it's the only thing that's keeping me even remotely on plan.
Muscle is twice as dense as fat. I'd rather be heavier and firm, than lighter and flabby!
I'm in the same exact boat, Red soley because I work out 5 + hours a week, on top of working an active job that typically has me hoisting boxes and racks of clothing on an hourly basis. If you're building muscle the scale won't be dropping as quickly. The tape measure will alwasy be the better judge. I've stayed static while pretty much being POP for the last 13 weeks. The only sanity is that I've lost 13 inches in those 13 weeks. Thus, I'm 2 sizes smalller with a minimal change in the scale.
When I was near the full I want my money back, I can be stabalized eating McDonald's melt down, COD put me on phone with one of the regional managers who's a work-out junkie. She told me what I knew but wasn't going to accept. It's far healthier to have the fat turning into muscle than muscle turning into fat. Granted, there will always be the one counselor at COD, who will keep telling me that if I stop resistance training the pounds will fly off. When she brought it up last week, I told her to look at my inches. I know I've lost about 3 times what I should have in that area!