It is possible you found a thermal or you encounterer mechanical lift becasue of the hill. I could be wrong, but I believe the FB's don't have elevator. If that is the case, the only way to land is to throttle back. My guess is that in your struggle to fly the plane back to you, you had too much throttle to land. As for going around in circles, my guess is you just need more stick time. Charge her up and get some stick time! Enjoy.