Store browsing Issue maybe...
Not sure where to post this, but I was searching for Storm Queen, and thought they must have removed it from the store (I had forgot the name of it)...
I would go to: https://www.daz3d.com/clothing-and-accessories, then pick Fantasy and Genesis 2 Female drop-downs, and it was not there?
I finally found it, and it was in: 3D Models-People-Clothing-Fantasy-Genesis 2 Female

If I go to: https://www.daz3d.com/clothing-and-accessories, and pick Fantasy and G2F, I get 231 Items...
If I go to: https://www.daz3d.com/clothing-and-accessories-fantasy-genesis-2-female, I get 331 Items...
It looks like 100 items are not classified correct for the drop downs?
https://www.daz3d.com/clothing-and-accessories, and pick Fantasy and G3F = 227 Items
https://www.daz3d.com/clothing-and-accessories-fantasy-genesis-3-female = 368 Items
Anyone else getting this, or do I have some switch set wrong?

Comments
The "Hide Items I own" checkbox does influence the amount of items shown in the dropdowns, so that might be the difference. You found the item you wanted though? I found it really quickly by typing the name in the store search box.