I agree it may just be Strike Doubling. (I use the term Strike Doubling as proof coins are struck more than once.
Here is a couple of DDO's I found on this year. Most are on the dates for this year:
Minor:
https://www.coincommunity.com/forum..._COOP_01.jpg
https://www.coincommunity.com/forum.../1962_62.jpg
Proof Reverse:
https://www.coincommunity.com/forum...oop_06PR.jpg
Medium:
https://www.coincommunity.com/forum...op_008PR.jpg
Business strike:
https://www.coincommunity.com/forum...4_MARKER.jpg
Here is a couple of DDO's I found on this year. Most are on the dates for this year:
Minor:
https://www.coincommunity.com/forum..._COOP_01.jpg
https://www.coincommunity.com/forum.../1962_62.jpg
Proof Reverse:
https://www.coincommunity.com/forum...oop_06PR.jpg
Medium:
https://www.coincommunity.com/forum...op_008PR.jpg
Business strike:
https://www.coincommunity.com/forum...4_MARKER.jpg


























