Mechanical Doubling. Common effect on coins. Here is some information on Worthless Doubling http://doubleddie.com/144801.html This one is for Mechanical doubling http://doubleddie.com/144822.html
Sorry this looks like the wrong kind of doubling . Usually this flat looking doubling is machine doubling. I always look at the smallest letters on a coin when I find one with the flat doubling on the bigger letter. If it is a real doubled die the doubling should show better on the smallest letters.I remember way back how hard it was for me and this is the way I used back when I was new at it. Maybe it can help you learn easier. Keep after them and good luck.
