Yes, the torpedo props are definitely bugged out. Though I do know that in my game for the short time that I played it, I always had my torpedoes behave correctly.
I've never have taken a look at the propellers before. When Fifi comes on, or anyone else, they can tell me if this should fix it.
Maybe your download is corrupted? Try a reinstall of both the game and the mod.
Happy hunting in the future!
