Great job Hooky........
Of the 7 instances you listed............4 are the first task of the leg and 3 are the 3rd task, between the RB/DT or DT/RB part of the leg.
In Tar12, leg 8, it was first task, before Detour and RB.
In Tar 12, leg 10, it was between the RB and Detour.
In Tar 13, leg 7, it was after the RB and before the Detour.
So that means it is split almost 50/50.........at 5 as the first task and 4 times as between the DT/RB or RB/DT or the 3rd task for the NELed team.