Legion Remix sets are missing items and needs to be re-bought again?

So I've visited a vendor which had a couple of sets that I didn't have left, and now all of the sets are back? And it says that I don't have something like 50/58 items in each of them.

Has BLizzard added new items they overlooked or somehow lost a data on what we have or something? It's tons of Bronze if we have to rebuy everything, and it's honestly infuriating