Inconsistent Promotion behaviour

[Former Member]

we have a non stackable 10% product discount promotion on category "A"

Case 1) When I have 2 different products of category A in the cart, the discount is applied to both.

Case 2) If I have only one product of category A with quantity 2 in the cart, the discount is only applied once, giving me on reduced price and one original price item.

From my understanding Case 2) is the correct behaviour, additionally in Case 1) orderEntryQuantity and orderEntryNumber on RuleBasedOrderEntryAdjustAction on PromotionResult contain wrong values (quantity of 2 though there is only 1 and entryNumber of 2 though there only is 0,1) and orderEntry of PromotionOrderEntryConsumed is occasionally null.

hybris version is 6.4.

Is it misunderstanding/misconfiguration on my side or is there a way how to limit the promotion execution to only one time for the cart?

Thanks