I've never been in the same server of at least one of my facebook friends/referrals

This is my sixth season and I've never been in the same server of my facebook friends or referrals... Why? Please There's a lot of people who is in the same server and when they play a game they have his friends possesion profit... I've got 13 friends/referrals and nobody is in the same server.

The game will not change the server of your team after the end of season. In this moment that isn't possible.