Bodymedia Fit

I just got the Bdoymedia Wireless LINK Armband yesterday. I charged it last night and when I put it on this morning, it said I had already burned 495 calories...but it was just sitting on my couch plugged into my computer. I had already put my stats in, so I am not sure if it thought I was sleeping?

I also read on the directions to only where it 23 hours a day...how do I choose when to take it off? Does it matter? Obviously it should probably be when I take a shower and the remainder of that time....what does everyone else do?

Last question...does it start over at 12am with new stats?

Thanks everyone!