There should be no need to switch stashes, the Crafting search does not care for which stash you use (the transfer does as it accoringly looks for SC/HC items only).
Are you using the latest version of GD Stash ? That bitmap issue should have been fixed a few releases ago, you will need to reimport though in the new version to fix it
EDIT: seems there still is some issue with uncompressed archives, will have to look into that…
EDIT2: the logic of Grim Quests xpack.arc for unused files is somehow different than that of any other uncompressed archive, not sure why. As I was using the same logic across all of them, some items from the xpack.arc ended up with the wrong image.
I get GD Stash less than 2 months ago. The crafting/stash problem disappeared on the next time I tried.
The display problem only occurs with Staves and TQ Shields: pictures are missing or some are way too big. NB: one Wizard Helm is a tiny bit too little.