Weaponsmith Archive

Hi, just made a DXR-6b sliced came out at 453 max. I used green cubes in making them so condition is over 1k. Ok heres the problem. I had a set of 4 green cubes, used one for a geo pistol and was left with 3. Put them in a bag on my vendor took em off tonight. Stuck 2 into the tool and a load of resources and realised I hadn't made a stock yet. Pressed Esc repeatedly to get out of the crafting box, made my stock then wham.... only 1 cube was in my inventory, and 1 in the bag I had pulled off my vendor. The other had disaappeared somehwere. Anyone had this before? I know I can probably get this fixed and will do when I get online tomorrow but is there a reason for this? A way to stop this? Or is this a freak bug?