Continuity mistake: According to the movie ticket stub, Ryan saw the film 'Sorry, Wrong Number' on 21 September 2012. Yet, a few days later in Moscow, when hacking Cherevin's files, many of them were created in 2013.
Continuity mistake: When Harper meets Ryan, who's out jogging in the rain, for the second time to recruit him into the CIA, the hood on Ryan's jacket moves between shots, most noticeably in the very close-up shot of his face. (00:12:00)
Answer: This is true of all versions of the character - his name's officially John Patrick Ryan, but he always goes by Jack.