What do I do if the nutrition page doesn't ask me if I completed a challenge (even though I joined)?
When you revisit the Nutrition page and you had joined a previous week's challenge, you should see a window appear that will ask you whether/not you successfully completed the challenge. It's possible that a browser bug, or maybe pop-up blocking software, could cause that window to not display.
However, even if that window doesn't appear, you should see a "Click here to update your status" button in place of being able to join the new challenge. So, essentially it shouldn't be possible to join a new challenge without recording your status in a previous challenge.
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