The Black Rock

In the scene with the auction they are auctioning off a work of art depicting the Black Rock. The Black Rock is the name of the ship that Danielle was on that crashed and ended up on the island. It is where they got the dynamite used to blow up the hatch. According to the auctioneer the story of the Black Rock is as follows:

"The Black Rock set sail from Portsmouth, England March 22, 1845 on a trading mission to the kingdom of Siam when she was tragically lost at sea. The only known artifact of this journey is the journal of the ship's first mate, which was discovered among the artifacts of pirates on L'ile St. Marie, Madagascar seven years later. The contents of this journal have never made public nor are known to anyone outside the family of the seller, Tovard Hanso."

The most interesting fact in there is the year. Did the Black Rock really crash in 1845? If so, then how are Danielle and Alex still alive and why didn't they age at all? And, let's not ignore the fact that the seller is from the Hanso family.