I note first of all establish the facts. The back of "Yes, Indeed" (TRANS-WORLD 718) was "Real Rock Drive" (first published in ESSEX 310). This title has been published but already LONDON DL 20 069. It was therefore looking for a replacement and there were only broad ESSEX published titles to choose from.
I suspect that "Rock The Joint" won the race because it was the then most popular titles.