shields are incorrectly positioned on players

As you can see in the screenshot, the shields are offcentered from the arms, making them appear as though they are clipping into the arms
It should also be noted that offhand shields are STILL upside down after all these years, resulting in any custom textures being upside down, or even custom geometry being upside down as well. Figured that'd be a related issue since it's part of the same problem.