At a CLANNAD After Story event “Kono Machi no Negai ga Kanau Basho” held on April 12th, the extra episode bundled with the volume 8 was announced to be Fujibayashi Kyou’s arc. A preview of the episode will be held on May 24th.
The TV programming guide of BS-TBS channel provided the synopsis of Kyou’s arc in the preview section of CLANNAD After Story episode 25. It is possible that the correct synopsis of the recap episode was mistakenly replaced with the synopsis of the DVD special episode. The final volume of the DVD will be released on July 1st.
Source: MyAnimeList and snapshot of the event