Gaming Nostalgia - dissapearing plans

[azotyp]

Strange things happened to me lately as I was playing Nostalgia.
I found two plans of parts for airship.
Black Blade plans and Dragon Gem plans
When I walk to Kanbei (items creator living in tokyo) he is pronouncing the names of objects, then they disappear from my inventory, and they dont appear in his shop. Is this some kind of bug, hopw to fix that ?

 

[saxamo]

Did you buy them already? That's quite odd as that hasn't happenned to me. Did you trim the rom? I can't think of any other reason this would happen. they are suppossed to leave your inventory, but you can then buy them from him...