Allowing Multiplayers to join map

I have followed the dedicated server guide successfully and can manage to have multiple users in my landing level.
When one player jumps into a second level it takes the other player with him and I don’t want this - how do I stop this?
Also when they are both in the next level which is FPS view they can only see the arms of there own character, how do I get them to see the other character?

Thanks in advance