It's easy to get overwhelmed with a new machine that has fairly quick response time and there's lots of explanations for falsing. My first detector back in 1981 would false if the grass had water beads from morning dew or after a rain. I had to wait for it to dry before I could detect.
My next purchase was for a much better detector and on one of our early outings with it, it too was going off everywhere, but it was dry out that day. I decided to dig every signal and in a very small area I found over a dozen small objects from old nails to equally old watch parts. That really taught me a lesson that the detector may not be falsing, but actually was showing me how littered with metal that area was.
My next big confusion was discovering our land was peppered with small natural iron grits and nodules. A signal I was chasing kept moving as I dug until it was literally everywhere. Out of frustration, I tried a large magnet in a sandwch baggie, and I dragged it through the soil and in short order it had accumulated a few dozen of the tiny culprits.
So maybe try to determine if you can move somewhere the detector doesn't sound off as much so you can test it there. Toss down a few coins a foot or so apart and try to read them. Some junk items like nails, foil, pulltabs and so on would be good to test with too. If it's still misbehaving try lowering sensitivity. That's a good technique even where the detector seems to be falsing, as it introduces a "known" signal you can test against and compare to the falsing.
If you are hunting where there's lots of iron, and you also have iron disced out, some rusty nails or other junk targets might still sound randonly when they are on the edge of your coil. If disc is turned off, you'll be able to hear the iron and discover that was what was sneaking in on the coil edges. Because of that reason and others, I tend to hunt with no disc, so I hear all signals and I use the ID plus my best guess whether to dig it or not.
Make sure the basics are covered, such as good, fresh Alkaline batteries and that the coil is plugged in securely and the cable is not flapping around. Your shoes or clothes may have metal in them and every step might make a false signal. I own a couple of "hot" detectors, the T2 is one. If sensitivity is set too high for the ground conditions, it will let you know by its chatter. It can't always be used at "full throttle." The 2200 isn't really in that category, but sometimes a more sensitive unit gets built where its more sensitive than normal. EMI isn't usally an issue with it, either, but it might be something to watch for if where you're hunting is near power lines or other sources of EMI.
These are things you can check yourself. It's possible your machine is out of factory adjustment, it does happen. If trying my other suggestions don't help, you may need to contact the company to see what they think.
My 2200 is a good performer and I had no falsing with it at all. Though it did pick up the iron bits in my soil, I knew all about them by the time I tried out the 2200.
-Ed
