I was just spectating the Dominion League Championchip match when I decided I wanted to have a game myself in between. So i logged in the client in another browser. The client where I was spectating realized this and logged me out. I tried that a couple of times with the same behaviour to see if it was intended. Unexpected, but good feature! I like that.
But then I created a new table and started playing against Lord Rattington. The first two turns were normal, then I started to draw cards that I hadn't bought. The log even shows details from the match I was spectating.
Later I could continue the game. But it still behaved in a weird way. For example with $5 I could buy some 5-costs, but not Hunting Party and not IGG.