What happened? Aren't people on level 6 suppose to have Unlimited questions?

Not any more. Not since Midnight PDT April 16, 2012. Too many high level accounts were posting so many abusive answers on YA that Yahoo had to do SOMETHING to limit the amount of abuse and spam that high level account can post in one 24 hour period. That's why the limits were set, but the number of best answers you can vote for was increased from 150 to 220, and then it was increased to 400 votes for best answers per day. If you can answer 890 questions WELL and vote for 400 best answers in one day, you must type very fast. I reached the 60 answer a day limit at level 4 only ONCE, and there was less than 15 minutes of the Yahoo "day" left when that happened. I voted for a few best answers until it was MIDNIGHT IN CALIFORNIA, where the Yahoo English language servers are. That's 2 am in MY time zone. Yes, California does observe DST until November 2, 2012.

They took it away to limit the # of violations posted.

Way too late IMO.

From the Blog.... But we are also aware of people taking advantage of the unrestricted limits to spam and publish low quality answers, such as “Thanks for the 2 points” or “I don’t know.”

Starting today we have modified our limits for Level 5, 6 and 7 users. This will help us protect the community from spam and help those who want good, serious answers.

http://yanswersblog.com/index.php/archives/2012/04...

That changed back in April. The announcment is referenced.