Inventory/request

[Axxion]

The slots in the key items tab is graphical and not actual slots that can be used. They addressed this in a Q & A in one of the LL and I believe it was brought back up when they were announcing that they were deleting belts and using those slots to expand some of the armoury chest tabs. You can see its graphical by changing your inventory settings, you can see slots being added or subtracted in the key item tab depending on your inventory size settings

First i didnt know it graphical i assumed it actual space.