Joined Server, Problems joining games

[Gniddup]

When i join friends games, i can see what they are doing but they cant see what i do or what changes i make.
After a while i get disconected and apon trying to reconnect it says my profile is still in use and i need to retry in 50 seconds.

I have spent the best part of an hour trying to fix this and i cant seem to get it to work, changing names doesnt help and neither do fresh installs.

Feeling very frustrated, please help.