Nah, I didn't really want to see how many of each card was in my deck anyways.

Thanks for the report; this is a bug that crept in very late. We're aware and working to get a fix out soon

There are multiple bugs here - One of them is preventing the client from showing proper info on which styles you do & don't have, which makes it very easy to add styles you don't actually have to your deck. That will cause the deck validation to fail later. Removing the offending styles should fix things (though there's not a clear way to see which styles those are, unfortunately)