New biography just released. Have Horn, Will Travel: The Life and Music of Herman "Junior" Cook by Courtney M. Nero https://www.amazon.com/Have-Horn-Will-Travel-Musician/dp/157441982X  

If he were, a little late to ask. Well this is an issue of musician recollections anyway ... Shep Shepherd said the tune was tossed off at the end of the session because they needed one more.  Doggett is equally certain that the session was for this soon-to-be million seller because he had let slip at a gig in Cleveland that this was his new single, and the local record store had 150 pre-orders, called King, asked for Honky Tonk and was told that it didn't exist. Until then, Syd Nathan was pushing back on the idea of a two-sided juke box single because it would mean two slots out of 50 instead of one - a tough sell to jukebox operators.  150 preorders convinced him that Doggett had a tune with potential and greenlighted the recording.

There is no guarantee hat the order of the matrix numbers represents recordings order. Many matrix numbers were attributed after the fact, Columbia often numbered the tracks in the order on the LP sides, even when recorded on separate days. Verve and others re-used matrix numbers when tunes were re-done on a later session. There are many opportunities where errors can occur. The Blue Note numbering system is pretty foolproof as take numbers were assigned in recording order.  Musicians' recollections is another matter.