No "matching" 19/20 November?

Hello,

I've typically had no problem getting iTunes match to recognize albums and at least give me the artwork even if it won't match all of the files. 19/20 November, I uploaded several albums to Cloud that can be purchased in the iTunes store, but Match doesn't identify these albums - it won't even give me the artwork. I've tried to delete and re-add, I've tried turning Match off and then back on again. Any suggestions?

Cheers!