Congratulations on your first release!
I have a question though, did you only tinker with this file "backpack001.utp" and when someone installs your mod they put that in the override?
That will cause any file named " backpack001.utp" which is a common tag and several modules (maps) have that tag, but have different things inside them. Because modules are all tightly packed up they can do this, but the OVERIDE folder overrides most files and will cause any module that uses backpack001.utp will then have the same inventory and be cloned all over the game.
I once installed a mod that did this and had every footlocker i opened give me 100 credits and about 150 credits worth of sellable junk, I got rich fast, but it was sad to rarely get loot. I uninstalled that file after Taris, but still the memory remains.
Additionally, do the Sith ever use these weapons against the players? Or are these items added to the game, instead of modifying existing weapons to be stronger?