1) I had 4 plates of worldship armor, one with no enhancement, the others with Noshields, EMP, and Reactive (was testing out the barrels in my hold). I used another unidentified barrel which turned out to be ithalium paste on the unenhaned plate. It worked fine. I tried to use the now-identified ithalium paste on the other 3 plates. It said that it had no effect.

Maybe this is something new that I just don't know about, but I thought I could use different pastes and it would just nullify or overwrite the effects depending on what the first paste was.
2) I was selling stuff at Adventure Outfitters. I remember seeing a price for some armor as I scrolled past it, and then I sold some organic acid, shield power cube, and some armor. I don't think I sold anything else. Then, for osme reason, when I tried to see the prices for the items it had for sale, they were all "Nil." I undocked and redocked and it was fine.l