I have about 3 hours experience with my new SE, all in parks. Today I had a problem I'm hoping you can help me with. I was running in fast, sens at 20 manual, noise cancelled, etc. I would hit a potential target, just one, and get a reading, then in pinpoint got another reading, back to detect still another reading. Not numbers close to each other but pretty far apart. For example initial reading would be 0-28, pinpoint at 7-28, detect at 3-18. Target indicated 4" deep. Mineralization is virtually non-existant here. What gives?