Classic Classic Vs retail not simultaneously.

I'm hanging for classic. I'm super psyched. Yet recently when I tried to log onto beta just to poke around it disconnected my retail account saying I was logged in elsewhere.Obviously you can only have one instance of retail OR classic at time. Is this going to bother anyone else? I mean maybe I could fish in retail while questing in classic or vice versa. I can play Overwatch and WoW at the same time, but not these two?I'm not sure if this was intentional or an oversight, does anyone know more? via /r/wow https://ift.tt/2T5fh3X