Prop Hunt: Lift Team Limits

Hello guys

I am hosting a Prop Hunt server. The problem is that there can only be 7 players on each side (hunters/props). If there are more than 7 players on a side, the server decides to kill them so only 7 are left…
Somebody told me I had to lift the team limits or add spawn points… Anybody who has an idea on how I can do that and stop everyone from dying? xD