In each of the two races you placed in a position which would have delivered a result higher than 600 points.
Zwift does not show a result score which is higher than 600.
Your Race Ranking or Before score is 600.
Zwift does not appear to show a Before score of exactly 600.
So it might appear that the ZP race results calculations aren’t being done for you but they are. Unfortunately until you place in a high enough position to score a result of less than 600 points your Before, Result and Gain will continue to show blank/nothing.