Got this impression I am getting some doubles when buying stuff...maybe even from quests? And just now I took something out of the vault, got 2 and I wanted 1...Not really sure, I'll keep an eye on it, but...is it happening to anyone else maybe?

I just did my shinwa quests and pulled an item from vault. Nothing doubled. I think you may want to submit a ticket to have things double checked.

Yeah, good idea, thanks :)