Fast forward to the biggest loser challenge my work is doing. I weighed in on their scale after lunch and I'm 182.

I get home and weigh and weigh and weigh in just about every room in my house trying to see if it's going to change. Nothing. 174. I'm the same as in the morning some days and some I'm up a few pounds. I don't think anything of being the same as in the morning but what's the deal.
They say the scale there is calibrated so it's correct.
Which one would you go by? I understand I've lost 9 or more pounds either way I look at it but still. I think I'll go by mine since that's the one I weigh in on daily but it better go down the same number there or I'll be irate.
I was depressed all afternoon and came home and busted a$$ on my 4 mile challenge. What should I think?

This is nothing worth getting in a tizzy about. Really!
Weigh yourself once a day, in the morning. Don't weigh in the afternoon. Weigh at work for the challenge, but don't worry about that.