The Accuracy of Bathroom Scales

I bought a new scale. I have been using the one at my fathers house, but doubted its accuracy. Now that I have this fancy new one I am also doubting its accuracy. My fathers scale said 220ish. My new scale said 225.8. I seriously doubt this since I lost a pants size already, and the new pants size is loose already. Its either that or I'm gaining muscle mass and losing inches rather than pounds. Is that possible? I just don't know. I dread what my surgeon is going to say to me tomorrow. I'm scared that he won't be happy with me. Even worse, I'm unhappy with myself for not losing pounds. Just gonna have to hit the track and get a lot more serious exercise in. Gonna have to do my Jane Fonda!