Ghost signals.
You won't find anything in your holes if you continue to dig these.
Anything that bounces that much can be some kind of large piece of iron or other metal in the vicinity, and even if you knock out iron it can still bleed through the disc and show up like these signals.
The F2 can pick up bouncy and high tone signals up to a foot away from where this metal is actually laying in the ground.
If the soil is moist, this compounds the problem.
This could also be interference caused by a high amount of EM.
Power lines, buried or overhead, transmitting towers, wifi and even your cell phone can cause this.
Suggestions.
Make sure you tighten down the connection where the coil wire screws into the head unit.
Finger tight might not be good enough, use pliers.
A hassle I know, but do it.
Also make sure your coil wire is not loose and flapping over your coil.
If this is the only site you have hunted, try somewhere else.
I think high EM is the problem, here.
Turn the sense down a couple of bars.
You should still get good depth but it will quiet down some.
Quit digging these bouncy signals.
Look for a better place to hunt, and dig signals that are more stable...like ones that stay on one number or only bounce a couple.
If you want coins, quarters should be somewhere in the 78-83 range, usually 80--82.
Dimes, 70-73
Copper pennies, 70-71
Nickels, 30-33
Zinc pennies, 50-61.
Dig solid tones, and numbers that don't bounce much.
You have a lot to learn and it sounds like you are digging in the wrong place.
Keep trying, it gets better when you learn a little more.
