problem changing inputbox more to 1 value

Try going to the edit screen on one of the products in question and see what the ‘Quantities Rules’ input box says. If it shows you the rule you think should be applied then there might be a bug. If is says, ‘No rule is currently being applied’, your rule may not be applied correctly.

Furthermore, you can set site wide rules in the ‘Advanced Rule’ section and you can override rules on a per product basis by clicking the override checkbox on your edit product screen.

Please let me know what you find.

Thanks