There are three versions of this show here at archive. The one called cotsman is the best: it has the material from 8/22 and is complete. It is here:
http://www.archive.org/details/gd68-08-22.sbd.cotsman.14915.sbeok.shnf
This version, called Jools is also from 8/22, but contains only the second half, and is missing some of the best material of the show.
In the one called koucky, the second half (from Alligator) is definitely from 8/21 – it is note-for-note the same as for the 8/21 show here at
Archive.org.
This Jules version is missing a fine St. Steven and Eleven, a great Dark Star and Death Don't have No Mercy, and a stellar Other One>New Potato. Go Check out the full cotsman version.
I really like this show.
But this show is part of a great run of shows on 4 consecutive nights: 8/21, 8/22, 8/23, and 8/24 (released as Two From the Vault – which is probably actually one show, from 8/24).