I'm pretty disappointed in how people are responding in this thread. It's not really fresh news that accounts in the Bible contradict one-another. It's pretty clear that OP believes in the Bible AND Jesus' Resurrection. Hes simply wanting to know why accounts in the Bible contradict one-another if the Bible is supposed to be free of error. I always wondered about this too but in regards to the contradicting accounts of the exorcism in
Matthew 8
28: And when he was come to the other side into the country of the Gergesenes, there met him two possessed with devils, coming out of the tombs, exceeding fierce, so that no man might pass by that way.
Mark 5
1: And they came over unto the other side of the sea, into the country of the Gadarenes.
2: And when he was come out of the ship, immediately there met him out of the tombs a man with an unclean spirit,
Luke 8
26: And they arrived at the country of the Gadarenes, which is over against Galilee.
27: And when he went forth to land, there met him out of the city a certain man, which had devils long time, and ware no clothes, neither abode in any house, but in the tombs.
So was it one possessed man or 2?
To OP's question, I have no answer at this time, and I'm ok with that. It doesn't shake my faith in any kind of way. We are talking about translated documents that trace back thousands of years.
I do believe that Christ was resurrected and I do believe that demons were driven into swine, I just don't know all of the details.