I bought 200 cu's of goods from a station, then I brought them to sell in Geira Rutilus J-5. I unloaded all the goods from my ship and went under the Ship : Sell tab. The location on the right side of the window said J-5, but all the goods listed under "Local Inventory" were from the other station where I had bought the goods. At that other station, I had stockpiled almost 40,000x of a certain commodity, and other than that, I can think of no reason why this would happen. The problem was fixed when I made another ship active.