1.0 was different.
See the "Album Artists and “Performed By” in the 1.1 release notes for more information about what changed here.
Sorting by the canonical name of the first artist in the album’s main performers list (what 1.0 did) may have had some convenient consequences, but it was also fundamentally at odds with the notion of “prefer local album artist” and failed to represent some fairly common situations accurately (one example: the same person might release multiple albums under different names).