I set up a from position game to play with knight odds and it wasn't possible for me to castle (I was playing as white)
Did you check "white o-o and black o-o" and "white o-o-o and black o-o-o" ?
I see now, I hadn't gone into the full editor. I had pasted a FEN
#3 A FEN string includes castling rights (and move number, and half-moves since last capture, and en passant square). Perhaps you pasted it incorrectly?
