Continuity mistake: On the tombstone in the previous episode, Michael's date of death is 11.4.2005. But in this episode, when Linc goes to the graveyard to visit Michael's grave, his date of death is 11.4.2010. It is also a different grave from the original, as the original was in South America beside the beach, and here we are led to believe it is in New York. (00:50:50)
Revealing mistake: In the final scene you can see Abruzzi in his cell where they have reused shots from series 1 in Fox River.
Answer: Because of coincidence.