Maybe for the moment don't try to fix any ladders problems by waypoints, because sPlOrYgOn changed a bit the ladder code. Now it seems a bit better and all existing pwf should work with it, too.
Just for saving Your time , guys
@T Wrecks - I'm sending to You this new dll, to make sure if for some custom map (and You can also check standard maps, if You have time) don't have any problem with ladders.