I have the same issue. I've purchased an additional remote and would like to use both on the same TV. Samsung, please update us if you get this feature added.
I am in New Zealand and have just bought 2 genuine remotes to have and extra ones but I am having the same problem. I can use it for a while it then. Comes up and says there is already a remote conected and then disconects. This is rediculous it is a genuine remote and he sold it know I wanted to run 2 remotes for the TV's
Please Help us use 2 remotes.