Multiplayer Help!

Ok, first off. Sorry if this is the wrong place. I looked but couldn’t find a place.

I’ve been playing the game for quite some time. And I recently just started multiplayer, I have quite a few cars. 3-4 in every class. Had to restart because save corrupted.
Moving onto my problem

When I go into the different multiplayer lobbies it shows the different classes. Example: S2 Class: My Camaro is S2. But I can’t use it in that event

The only things I can use in the S2 class is my suburban and truck. Even know I have 4 cars in the S1 and S2 Class.

I can not figure out why.

Does anyone know why this is happening???

Thanks in advance