So, I was creating my first map after following Crash's tutorials and reading the Valve dev wiki threads. I created spawn rooms and it was kinda of a test map really. The thing is I was just finishing the map, then, I created the final entity tf_gamerules and the logic and stuff. I used the entity tool and created a new one, changed it to prop_dynamic for the doors. Pressed apply and EVERYTHING IN THE MAP CHANGED INTO prop_static. So, I had to redo the whole map again. My question is, What was that and how to act if I encounter it in the future. Thank you.