We ran a test on my server with both maps he provided and continued this on discord chat. The first file he sent was an altered version. The 2nd was a version that was unaltered. Both maps worked perfectly fine on my server. My server has nothing to "clean" entities or remove them, just a method to spawn bots and make sure they're unstuck.
I haven't been in my own server to test how the maps look but both maps worked fine, and LordofDeath did confirm both worked without any issues and was functional (did not reproduce whatever error he was getting).
And throughout the thread someone mentioned you can't add entities to maps. You can. Don't forget entities like rain and snow are a thing (env_rain, env_snow). I believe there's even a plugin to add models as well as ladders to this game. You can add those entities and functions similar to the object/model (aka the ladder).
Ex:
https://forums.alliedmods.net/showpo...3&postcount=19
Edit: Uploaded our convo -
https://www.youtube.com/watch?v=XIF-q1yPHuE