Gun adding codes, odd things

[clebbins]

I was derping around with artmoney for gun adding when i discovered something strange. It appears that the non-working codes for guns still correspond to thoses items. I found the right variable, i froze it and i changed it to let's take tar-21 cherry. When i select a weapon, not a nade, from shop, with frozen variable, it shows me this weapon i chose, but when i click select to customize before buying, it shows me tar-21 cherry. As my english is not very good, i assume this explanation might be confusing so here are some screenshots :


TAR-21 Cherry : 1740




DUAL BARBATOS : 395




BG CRUSHER : 876




TEMPEST : 396



But it still says invalid item request...
So it seems that those codes are still in their databases, but there's something wrong in the buying process. What do you think we can do to use correctly those old codes ?