I had this happen to me the first day I tried to access BBMP. The web site was also extremely slow. It eventually cleared up and speed returned and have not seen this since. It's a huge security risk if BBMP is crossing accounts due to some network glitch.
+1 on trying a hub. I have successfully hooked up two external drives on my 922 though a non-powered hub BUT had problems with the first one I tried so don't give up if it doesn't work until you've tried a couple different models of hub.
Depending on what you are connecting a powered hub may...