Can't Set Remaining Quantity to 0?
Occasionally, merchants have encountered a glitch on the Gateway platform where the Merchant Remaining Quantity remains set to “1”, even after the Merchant Available Quantity is set to “0”.
Our technical team is working to eliminate this issue as soon as possible, but in the interim, there’s an easy workaround that will allow you to properly set your Merchant Remaining Quantity to “0”.
Fixing the Issue
Look up the product from the "Product Group" page on Gateway.
Set the Merchant Available QTY to any number HIGHER than 1 (don't worry, this will only be for a second!)
Click "Save" at the bottom of the page.
Refresh your browser.
Set the Merchant Available QTY to "0".
Click "Save" again.
Refresh your browser, and the product should now be unavailable.