Yes probably. They once tried to change the height or hitbox or whatever of the deispensers which they reversed. Suppose it's part of the game now unfortunately. As long as players don't reach the most lamest places where their sentry either not can be seen or not be destroyed I think we have to live with it
yep, and if valve thinks it's a glitch they will just clip it off so nobody can stand there on the left uhm "room-roof" you can build, on the right side "room-roof) you can't build