So I've got a Discovery 2000, which I've learned on here is a Lone Star. I've not spent alot of time with it in awhile, so I've been getting reacquainted with it out in the yard. First day, I'm working the sidewalk edge and machine say nickle, I dig a plug and there in the bottom is a nickle. Easy enough. Try some more the next day I dig a dime and a few pennies. Now everyday I go out there it's pennies, nothing but pennies. They read from the penny range into the dime, 50 cent, etc., but they've all been pennies. All total I've found 2 nickles, a dime and lost count on the pennies. Why do pennies read in the dime range sometimes? Although the dime range shows penny on it also.....