Moving it on your arm and it making a noise could've meant that it thought you were no longer wearing it and it powered off. Like Jane said, different sounds mean different things.
I upload in the morning while I'm in the shower. Charge it at the same time, too.
I wear it as close to 24 hours as I can get aside from shower/epsom salt baths.
Welcome to the world of GWF. You'll love it.
