Kiosk selling out of stock items

[MPDC]

Hi there,

We're using the Kiosk, and today we had customers order items (using the Kiosk) even though they are out of stock. I triple checked, and they definitely show as out of stock within the item settings. Yet they are available on the Kiosk. 

I've looked all through the settings and can't figure out why this would be happening. Any ideas? 

PS: Not sure if this is the right forum for Kiosk, but I didn't see one for the Kiosk.