In infection, it doesnt spawn where i want it to, it just spawns on a place where there is no spawn point (blue thingy) in forge.
Those "blue thingies" are respawn points, if you have placed any starting points, people will start on the respawn points.
This isn't about the site. It goes in Forge Discussion because it is about Forge. If all the spawns are blocked or set to the wrong team (attacker, defender, etc.) the game has no available spawns and uses a default "phantom" spawn. Put down more spawns, make sure they are neutral.
make sure when you are in monitor mode that you hit start, then change the gametype to Infection. You can then place starting points, which should remedy your problem.