Crappy Zincoln cent. That is zinc rot causing the MM to be distorted. Spend it before it completely disintegrates. http://lincolncentsonline.com/Q&A.h... the,such as we see with split plate doubling. http://www.error-ref.com/zinc-deterioration-on-lincoln-cents/
And.. Mint mark can't be Doubled Die for that year if that's what you meant. The mint mark was hand punched onto the die so it can't be a DD variety issue.