One thing for sure is that it isn't an RPM. The mint stopped punching the MM onto the dies in 1989/1990.
After that date it is possible for them to be part of a DDO. I can't really tell what is causing any doubling you are seeing. A clear closeup of the MM and date would be helpful.
Words of encouragement are one of the major food groups. We need to consume them regularly to thrive and grow.
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