Just got my 3030 from cancer detectors two days ago. Upgraded from an at pro. Trying to learn all the buttons and menus on this detector. I have seen a video of someone using the ctx in a park ,and when he found a coin spill,all three coins were shown on the screen. I'm in Illinois and there's 5 " of snow on the ground ,so I did the same thing on the floor with 3 coins about 2" apart. And the screen only shows one circle icon instead of 3. Is there a certain option to tic on that I'm not seeing in the menus?? Would be thankful for any help...