You are the one not making sense.
The World and Kipchoge knows that the 2:00:25 time does not count as a PB due to the set up. Considering that as a PB would be fooling himself.
When he talks of a PB he means the best time he ran in an official marathon.
How do you know? For all we know he might count separate PB's for all separate race courses he's run the Marathon at!
I do! ;-)