Single women travelling alone were usually held at Ellis Island. An "x" should appear before their line number. Alexandra doesn't have an "x" nor does she appear on the detained alien list found at the end of the ship manifest. That's too bad as it often has more information about her. Someone must have been waiting for the ship to arrive and picked her up.
You ask are there more records or "this it". I'm not sure you realize that the manifest is two pages... you are showing us the first page. There are a number of other columns on the second page that has more information about Alexandra.