So on my zombies map everything was working fine until I added my second floor. The zombies go up the stairs and step onto the 2nd floor platform I have made, but they eventually just stop for some reason, even though its a perfectly straight platform and it looks like the zombies should definately ...

So I uploaded a early version to my workshop before, however I basically made it into a completely new map now, so I would like to re-upload it. However I was doing it in the same map on radiant, so if I click to publish it just asks if I want to update the workshop file. Is there a way to make a co...