@Bigboat: the per-zone flow rate and the global flow count are implemented slightly differently. Specifically: because flow rate at the beginning of a zone run is often not stable, the firmware has a logic that only starts counting flow past the first 90 seconds:
https://github.com/OpenSprinkler/OpenSprinkler-Firmware/blob/master/main.cpp#L98
the total count and volume numbers reported do not have this logic. Since the zone runs in your case seem pretty short (120 seconds), it’s possible that in the last 30 seconds there just weren’t enough clicks to calculate a meaningful flow rate, resulting in 0.00 value reported.