I went out for a couple of hours this past weekend and started digging found a penny and a bunch of caps and foil, but I am having trouble pinpointing on many of the targets,I have tried all the different ways to pinpoint. When I get a signal, I pinpoint ,then dig, recheck the hole and still have signal, dig some more recheck and nothing then search the area around the whole get the same type of signal and dig up a cap or tab next to original hole, I have read how the coil works and watched the videos but cant seem to figure out whats happening the signals seem to be repeatable enough. Something else that happens is when using the pinpoint button , you find the peak,move forward or back,the signal doesn't drop off, that doesn't happen all the time but enough to question.Any help would be great before I buy a backhoe and bulldozer.