Yes, this is caused by the previous login still being connected. When the extender or xbox360 disconnects from media centre the session is logged out, but if your pc is under a bit of a load, or is a tad slow it can take a minute.
When the extender/xbox360 connects to media centre it logs into the PC, similar to the way a normal user logs in to the pc, its just done in the background.
So you see, its the same as if you log out of windows then try to log straight back in again, you would need to wait for the "Logging out" screen pass so you then log back in.
Am I making any sense?
