OK, the fix for pushwalls isn't exactly a fix. It mostly is, but I have found one circumstance where it creates a new bug. Episode 3, Level 6, As follows:
From the front (after pushing it):
From the back (after pushing it):
From the overhead map (after pushing it):
I used noclipping to get past it when it didn't open all the way. Funny thing is, the sound was still the same as for opening the entire 2 tiles. and it still counted towards the pwall count at the end of the level. I am going to see if it does the same thing again by repaying the level.
Edit: OK, it wasn't what I thought. Apparently, if there are any enemies standing behind the wall it won't open. In the replay, it was giving the sound of a pushwall being pushed when it's against another wall. I used the overhead map and saw there were two enemies in the spaces where the wall had to move, and the game was refusing to move the wall. My guess is that in the first one, there was an officer in the second tile, but not in the tile immediately behind the pushwall, so it was able to move one tile before it had to stop.
Would that still be considered a bug? I did find a solution, though. If you go to the area you started in, where the officers are behind the columns, and fire a couple of shots, the ones blocking the pushwall will leave and you will be able to open it fully.