I’m not sure if I’m doing something wrong, it doesn’t work as expected. When I set the options as you said, the 30% is being applied on every item after I add 2 items. What I need is: Buy 2 of these, the second one will have 30% off (only one of them). If you buy 3 of these, only one will have the discount, but if you buy 4 will get 30% off on 2 of them, and so on, every 2 items, one of them will have the 30%.
I tried to limit the usage to 1 item, but the discount is beign applied to only one item no matter how many items I add.