There seems to be a bug with what slot item names\quanities are placed into. The tool text for Club shows up when I mouseover the 'active' Empty slot, and clicking said 'active' Empty slot does withdraw the Club.
The bug passes down from W to T; though for T the name\quanity might not appear at all, I hadn't paid attention to the thirs row when my warehouse was full, and I sold most of the items I wasn't using.
I also only have one potion, so I don't know if this affects the consumable storage at all.