HaloMods "Classic" Read-only Archive

I'm having projectile collision errors...
The problem is that in certain areas projectiles go right through the collision bsp, but other objects don't.
The map compiled without errors, and I didn't use tool** so I dont know whats wrong.
Also vehicles often get stuck in these areas.

I've obviosly never had this problem before so any help would be nice .

glitch/bug, not error.

vehicles get stuck, projectiles and equipment go right through, bipeds are fine(or so it seems).

Are all the collision types set right in tags?