Assist Definition Clarification

Competition Rules/Strategy
#1

I have read and re-read the definitions, and I believe this would count as a third assist - but I want to see if I am missing something obvious:

Robot 1 in-bounds in red zone and throws over the truss to robot 2 (Red Zone Robot 1 Unique).
Robot 2 takes possession in the blue zone but backs up into the white zone (White Zone Robot 2 Unique).
Robot 3 takes possession in the blue zone and scores (Blue Zone Robot 3 Unique).

#2

Yes

#3

You omitted that Robot 2 also had a possession in the Blue zone. So the computer will calculate the “best” configuration for assists, which is to ignore that possession just like you did.