weird letters

Doom II : Hell On Earth
MAP01 : Entryway is entirely cut-off 1 pixel from the top. (You can see the outline is missing on the very top)

It seems like the unused font letters have been removed after Doom II's release, everything afterwards just borrowed the used letters, and sometimes mutilated them to make new ones.
Some errors might occur due to lack of thorough research for the more obscure letters like X and V.

I have no idea what's going on with Ultimate Doom 0's though, maybe someone was being artsy in the compiling department.
The BFG edition's errors look so haphazardly done, but then again, who the hell cares about a skim Wolfenstein map and a liquid shit maze anyways? Let's do the fuck whatever and throw it in there.