Here i have set to limit discount to every nth item with product percent discount 100% and minimum 4 items, but its deducting the price of the 4th and 8th item added to the cart (in the sequence) instead of taking the lowest price items . Discount is now $170 + $39 whereas discount should be $39 + $39

Screenshot here : https://pasteboard.co/J19FJzg.png

Thanks for your help