Usually if I get some area of ground that beeps, the detector will cycle through random icons for a bit. The depths also change if I move the detector away and come back. Pinpointing doesn't really help... I've tried testing this function and marking with a stick, then digging around a bit and it won't pinpoint where I had marked earlier, and the signals would also change from the various icons. Are these "junk" signals that I should just be ignoring? They happened a lot in the hour or so I've used the detector... Also, on the pinpointing, it's the very base part of the shaft where it connects to the coil plate that marks the spot right? I'm digging on a gravel/rock driveway looking area as well as some woods. I scraped around on two of the signals and found a big iron nut and a piece of duct tape, both on the gravel underneath some leaves, the rest I gave up on. Sensitivity is on the factory setting. It also often chirps on something and then I can't get it to do it again when I got over it. Are these random beepings just something I have to get used to? I found two fairly toasted surface pennies on this gravel area earlier and was hoping that there would be at least a few other coins under the surface. Thoughts?