1. Surely not, Transcaucasian republics are not the Central Asian ones.
2. I'm curious about the values you've cited here. There was no referendum held in Armenia, Georgia and Moldova along with the Baltic States due to their split-off tendency. Azerbaijan, however, participated in the
17th March 1991 referendum and 95% of voters declared to be interested in 'nessessarity to preserve the Union of Soviet Socialist Republics as a renewed federation of equal sovereign republics, which will fully guarantee the rights and freedoms of all nationalities'. There were no additional referendums held in Azerbaijan thereafter, the independence in November 1991was declared by decision of Republic's Supreme Soviet (which was already after the coup attempt took place, ruining the idea of a new union treaty).