Well, some people claim that 'refreshing' the list of accepted answers may help (done), but generally we can't do anything more. If it really was rejected (we need screenshots to prove it, after all everyone often thinks they answered correctly but after a careful examination it turns out that a finger slipped and there's a typo), then it's a bug. Yes, we've seen proof that it happens, but the developers need as much proof as possible.
You’re right about mistakes. I’ve noticed after the fact that there have been times when it was my typo. : ) But in these cases I do have screen shots ....I’ve just got to figure out how to post it. I’m aware they give step by step instructions... so if I get time I will send it. Thanks.