im not sure why this is but i have a pathnode inside the window and there is traverse. occasionally 1 or 2 can get through but the rest linger in the back until they eventually die because they lived too long. Help me please, id be very grateful.

Make sure you add pathnodes, window entry, and traverse (zombie wallhop).
Note: some Ground Spawn zombies cant jump through windows.
Check if you placed all the path nodes correctly,
lastly, see if your zones are also named and placed correctly.

make sure the pathnode in the window isnt inside any wall or window ledge, also make sure the walls of the hallway where the zombies come from isnt intercepting any of the zombie window, i.e walls touching the boards or anything.