SetterGuy,
That much difference in losses IMO could be due to normal "settling in" of a new pond. It may or may not be due to Soilfloc. My guess is it will gradually continue to get marginally better over time as mine has. Evaporation here for the past several weeks has been about 1/4 inch per day on sunny days. When nights are cool, and have lower dew points, the ponds with their warm waters will continue to lose moisture to the air during those nights, as long as the water surface temp is above the dew point, so I have seen some small evaporation losses at night.

BTW, we have had 0.9 inches of rainfall here since July 26 (40 days).

My pond is now down 24.25 inches from full (spillway) pool. It will take a lot of rain and pumping to get it back up the 20 or so inches to "normal" pool. The creek is down to a few deeper potholes.