I am having this issue as well. for the past 3 or 4 days connecting to the servers has been a nightmare- although once it finally connects it seems to run just fine.
I've bid on numerous items over the past few days which have expired and i haven't recieved any of them. I was told they had a glitch like this on PC, it's likely they'll have to patch it soon or the entire market system will become unusable.
I have the same problem, i have quite a few items purchased that says "expired" "you are winning" and i can't get the item, or my AD back. it's been a few days now for a couple of the items. and i believe there was server maintenance this morning. is there a work-around for this that PC uses? or should i write up a ticket?