And you believe this is somehow supposed to move the time of the shooting from 1:15 back to 1:06? That much of a time discrepancy?
Who ever said 1:06 or 1:15 for that matter?
The combined timelines of Markham, Bowley, Davenport and the Methodist hospital make it obvious that Tippit was in fact killed prior to 1:10.
A voice activated recording system, clocks in the dispatcher room not running synchronized and the Communications Supervisor of the Dallas Police Department saying that times mentioned on the recordings/transcripts can under no circumstance be put any stock on explains the gap nicely.