Furniture Confusion

A little confused about how I have some of the things I have-

I have the Surumar Library, decided it looks cool, and went to check how I get more.

It appears to be: Honored with the Nightfallen + resources. All well and good, except I never played regular Legion; only Remix (and that goes for any warband toon, I somehow just entirely missed arguably the best expansion).

How in the hell did I get this lol