Copper golems treating ominous potions of any intensity as one item and therefore sorting them into the wrong chests

As I tried to build a copper golem sorting mechanism that has 2 stories, one for the first 3 intensities (I-III) and the bottom for the high half (IV-V) and also for Ominous Banners and overflow, the copper golems treat any ominous potions (all intensities) as the same item and therefore, mix all of the potions regardless of intensity in the same chest rather than sorting via intensity (since they can only be sorted by stacks, meaning that for example, Ominous 5 cannot be stacked with Ominous 1)