Inventory Upgrades

[Synticket]

I bought an inventory upgrade from the shopping plaza just now, and the description of it says that it increases my inventory size by 50.
Problem is, my inventory space didn't go up at all. I had 83 out of 130 inventory slots filled before I purchased the upgrade, and I had the same amount afterwards. Does your inventory upgrades not work, or am I missing something?

[sweetARMS]

i'm sure its storage upgrade not inventory