Other mistake: Elizabeth states her father died in Stalingrad when she was 2, which was 1942-1943, and she claims she came to America at 22 when it was 1965 and she would have been 24-25.
Factual error: When they are playing hockey in the driveway, the FBI agent says he lived in the city in St. Louis. He then says they had street names like 1st street, 2nd street, Washington, Lincoln. First and Second street exist, but they are both in industrial areas and no-one ever talks about them. More to the point, there is no Lincoln Street in St. Louis at all. (00:27:00 - 00:28:00)