Seizethecarp,
1960-1961 for Hawaii is plausible.
Its possible that since she knew she was going to transfer to school in Seattle, that either she or her relative in the seattle area got the apartment rental app in, and sent in the info for the entry in the directory ahead of time.
“1960-1961” or “1961-1962”sounds like the entry cutoff date was sometime a little ahead of midyear, maybe May or June.
The picture of the Seattle Polk entry in the “1961-1962” edition is here and is corroborated in Stanley Ann’s UW transcript.
http://www.wnd.com/2009/08/106258/