As always, the system is designed to reward consistent high-quality submissions. If you find that you are unable to submit more than one quiz at a time, it shouldn't be too hard to tighten up submissions to ensure they're of a high caliber and ready to go online straight from the queue. 99% of authors on the site can only submit one at a time.
As for the sunglasses, I couldn't tell you all the factors that go into the player rating process. If your ratings are fluctuating, that means everyone else's are changing as well.
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Senior FT Editor (Video Games, Television, and Entertainment)
Chat Board Moderator (Author's Lounge)
Amazing Trivia Race Taskmaster/Commission Hander-Outer/TRICster