Question

why did the narrator feel that schultz whose story was in the newspaper was not the schultz he had met

Answer 1

because he thought that at one time how can a person be at two places

Answer 2

The narrator feels that Schultz whose story was in the newspaper was not him whom he had met because according to the newspaper report, Schultz met with an accident and slipped into the coma.

All of a sudden, he had recovered from the coma and regained consciousness, so this didn't make any sense to the narrator.