Hello Shaun , there's supposed be "In God We Trust" On the edge . Yours says "MO" ? Where's Curly and Larry ?
The edge is supposed to have the year and mint mark and "E PLURIBUS UNUM". So the "M" you see is from that. "In God We Trust" was moved from the edge to the obverse starting in 2009.
Could be a lot of things from an error to post mint circulation damage. the picture is in conclusive. You'd need to go around the rim looking for other anomalies. It's a 2009, what mint mark is it?. It could be two coins edge to edge and hit hard to imprint form the other coin. It could have been run through the edge lettering machine twice. You'd need to look at it in detail to figure out which one it is. At this point it looks like this coin and a 2007D were banged together and the 7 and D left a reverse imprint.