Hello all, I've been playing with the card [card]Confusion in the Ranks[/card] since I started playing magic and today I played it on MTGO and it didn't behave as expected so now I'm worried I've internalized how a card works wrong for the last 15 years.
Assume the following board state:
Opponent has 1 Orinthopter in play.
I have 1 Confusion in the Ranks and 1 Grim Monolith in play

My opponent casts a Memnite. It resolves. I click on the trigger from Confusion in the Ranks expecting my opponent to now have to choose the only legal target: My Grim Monolith.
But on MTGO instead it says the ability is removed from the stack because there are no legal targets. The only thing I can think of (beyond it being bugged ... which is possible, it's modo) is that " its controller chooses target permanent another player controls that shares a card type with it" means another player than me when I always read "another player" to mean any player other than the controller of the triggering object, so them.

What do you all think another from me, or another from them?