Could someone explain how the gallery filters work?

@Daleylife
That's how I thought they were suppose to work.I mean when I select base game only, it filters out everything but the base game, but as soon as you tick one expansion,it includes lots with all expansions.Really don't get their concept here.Why have filters if its just gonna show everything anyway.

@liliaeth
That's another issue, when I search terms or hashtags nothing shows up.

@paradiseplanet
I get it now to, but it is nonsense.