Publishing bug
On post 1 can't you just take his king?
You're not understanding the post or the problem or chess.
When the sides castle, the kings should be on g1 and g8, but with this bug, they're landing on h1 and h8.
So on reality the king is on g8, but the display shows it being on h8.
Correct. That's one manifestation of the bug.
I reported another where O-O-O isn't shifting the rook at all.
Someone's got to tell Eric, and it ain't gonna be me.