I bought my mxt last week and after finding high amounts of Iron in the first two places I hunted (my own yard) and along the RR Tracks in the rr rightaway. I decided to do a city park today. I found several pennies and worked pretty hard for them. I found some foil. My problem is I get lots of hits so I decided to just concentrate on the loudest ones for the day. I found that everytime I swung the coil over a target the screen called it something else and the numbers changed. I went back and forth then turned from north and south to east and west and it changed some more. I must be getting real good at pennies or there are alot more of them. I cannot tell whether a target is a coin or foil or iron or junk because every time I swing the coil it is different. What can I do to help that? I am using the coin mode and setting it up on the little triangles on both dials.