I'm getting a system message when I go to sign Oly that says that 50 are maximum number of matches that can be done in 1 week, but when I oly stat myself it says I have 29 matches left for this period (class based). My overall number of matches are at 50, but those include matches from the last weekend of open. Luckily, I'm not pushing for hero this month, but it does keep me from feeding/enforcing, and it would screw over anyone that's actually going for hero. I have also had clan members that did not get their match count reset for the new week.
I've already submitted a bug report for this, but I hope that Korea is pressed for an emergency fix. I've been playing retail since Jan 09 and this is the most bugged roll out of an update that I can recall. For all the money you're making from people with the store there should be a better level of QA before these patches are applied.
http://img6.imageshack.us/img6/1433/olympiadbug.jpg (http://img6.imageshack.us/i/olympiadbug.jpg/)