I am a new hunter and was hoping people could give me there opinion on a issue I have come upon. When hunting I will get a hit, then on the return sweeps nothing. If I remain in the same place sweeping, on occasion I will get a hit again, then it's gone. Do people usually dig these or is the machine trying to eliminate the target and just misses every now and then? Any thoughts? Sometimes if I switch to pin point I can find the location.