For the ring, I don't think the game can hide only one of the rings, so to not make the glove hide the ring on the other hand as well, they left them there...

As for bracelet, I think since it's intended to be used with the chest piece as well which contains an extension to the glove (Why they didn't make it a part of the glove? Ask the devs cause I go no idea.) it does go over the arm where the bracelet would be on the left arm... And if it hides bracelets on the right arm, I imagine it's once again engine limitations that they can't hide just one side.