I copied the Gun Runner's vendortron and I can link 'em up with the vendor chests of Crimson Caravan and Silver Rush and the inventory shows as normal, but for some reason the vendor chest of Julie Farkas and Doctor Usanagi are strangely empty, but functions as normal when I barter with the respective doctors.

Julie Farkas' is totally empty, Usanagi's have a few forceps, medical brace, surgical tubing. Nothing else.

Can someone help me here? What's going on?