it says that when players use your teleporter you get 1 class point per use however you dont gain any at all and not sure if the totem give calss point as well which makes it sorta hard for the class to get class point unless fighting in close combat or range

I don't think there is any bug on it. I mean that my sapper mates aren't complaining about such a thing.
Your main problem as a sapper is that you need your team to earn class points.

Only the first teleport use for each player give you classpoints. Then every 20 seconds the same player can generate classpoints again.

Its because there is no cooldown on using teleport. So no one can build teleport entrance and exit near eachother and use it like 100 times in a row for imba classpoints.

Build the teleport exit not that open in the map. It will be destroyed too easy. Build it better in a hidden position some meters away from the spot.