I'm picking up some NPC's. They're in the Tinn System according to my filter, but according to the inventory they're in the Shatuun System. Suspicious.
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"I like Justin Beiber Mash-Up's the best" is what I keep telling myself.
Tinn planets were taken from Shatuun during that stage of galaxy changes. Its likely that their inventory location hasn't updated - it usually does so when they are moved. If you mouse over the planet listed in the inventory and check the planet id, that should be the same, and allow you to determine which planet it is now.