The problem is that the first texture from millenia's swords is overwriting the one for Apz' buster sword. You can either replace that texture again, and have the next 3 swords messed up, or do a little editing. If you convert both textures to workable formats, you could scale the texture from Apz' sword so it fits inside the top-left section of Millenia's texture sheet. Then you'd have to change the UVs for Apz' sword model so it fits the new texture.
If you're having difficulties with this, I don't mind doing it for you and sending it over, just give me a PM.