Complex sentence: Versions 1.21 and 1.22 were released as very minor updates, both of which listed themselves as version 1.2 in-game and in all documentation except for the "readme" file.
Split into simpler sentences: Versions 1.21 and 1.22 were released as very minor updates. All revisions of version 1.2 list as 1.2 in-game and in all documentation except for the "readme" file.