So the companies position is you had two out of 4 layovers in Oakland or 50%. The matching location only not date or time is the part that they are falling back on.

1. y = number of scheduled layovers when the pairing was awarded/assigned to the pilot.
2. x = number of scheduled layover locations that can not be paired with actual layover locations (matching location only, not date or time).

But definitely worth a grievance to get x and y better defined when an extra duty period is added.