I've only had one problem with Bitmit and it was resolved the next day. I'm sure it's just on your end and should be resolved shortly.
I dont think so, I can see bitcoins arriving at escrow addresses for buyers (via blockchain.info address explorer) and can see many confirms, but bitmit says 0
there is a definite problem with their bitcoin processing code
I have sold hundreds of entries and have over +110 feedback 100% positive there, never had issues like this