Anyone having problems ID'ing memorial pennies? I have dug memorials with CO's from 34 to 45. Other coins are in the proper range with nickels at 13, dimes almost always 44 to 45, quarters at 46. Why the wide range on memorials? I though maybe depth but I have dug memorials from laying on top to 5" deep and still get number all over the place...Any ideas or is this something that is normal for the etrac? Thanks