SC2Mapster

Could you explain how here?  Years ago, I recall trying to mess with the built-in inventory system and I was always having an issue like such:

Items slots 1-4 have items A, B, C, D
1:A
2:B
3:C
4:D

If I dropped item A (slot 1) on the ground, and ran a loop to check what was in each slot index, it would then look like this:
1:B
2:C
3:D
4:

Has this problem since been fixed?  I dont think I would ever go back from a dialog based system, but who knows with future projects.