I have copies of the documents you cited. However, no person other than Neil Abercrombie places her in Hawaii, no one ever saw them together, there is no record of her presence in Hawaii after graduation on the mainland in 1960.
She may have been enrolled in Hawaii, in anticipation. But there is no evidence of her attendance.
The remainder of the WA records relate to EXTENSION COURSES.
Obama Sr. graduated from the University of Hawaii in June 1962. He went to Harvard to study economics on a graduate faculty fellowship. He never returned to Hawaii until a short trip in 1971.
There is no evidence that he and Ann had ever lived together after Junior's birth. Ann filed for divorce in 1964, in absentia of his husband.
What is your source that she only took extension courses at U-Washington?