Just to keep you updated on my proceedings: The first part of the job is done, I think. I typed all tracks that I know of into an excel table, ordered by (sometimes guessed) recording date, including tracks that were released only on subsequent issues, or only on 45s/78s, and including "outtakes" or alternates that popped up on some CDs.
It turns out those two dreaded RCA box sets do not inlude any outtakes or alternates, and missed one track from the "Dancing Under Latin Skies" sessions that was on the LP, "Chattanooga Cha Cha". Go figure.
Now comes the next part of the work, collating all the personnel listings from the second box set and relating them to the session dates.
The third part will be typing all these data into the BRIAN discography database.
I ordered three more CDs to complete my collection, the one with Abbe Lane, the one with Woody Herman, and a Dance Mania compilation with lots of outtakes, some of which are not on the Dance Mania Legacy double CD. It still is a mess.