Mama Obama would not have to wait 5 years to naturalize her son. She could have done it immediately upon her return to Hawaii. It's as clear as day in Title III, Chapt. 2, Section 322. Scroll down to page 84 (top-of-the-page numbering; bottom of the page says 86):
It's not the greatest of scans, but it's legible.
So I think I have totally refuted you.
1) Mama Obama could have easily and legally obtained an nonquota immigrant visa for her son, even if he were born in Kenya, which would have allowed her to take him back to Hawaii.
2)Immediately upon her return, she could have applied for his naturalized citizenship and he would have received it as soon as it was processed. There was very little immigration in those days, so there's no reason to expect it would have taken very long at all.
Ergo, she absolutely no motive for fraudulantly registering his birth in Hawaii.
So, given that we know his birth was registered in Hawaii, you birthers have no case, unless you birthers somehow miraculously forsaw that he might run for president.
The scenario suggested was that Stanley Ann went to Kenya with Obie Sr, didn't like it and having to share with Obie Sr’s other wife and decided to come home but couldn't get on a plane due to her late stage of pregnancy. She was short time to do anything so would she have time to find an immigration lawyer to advise her over in Kenya and if she did what advice would he give her? Or did she and grandma just decide to take the easy way and fake it? It makes more sense.
As for Stanley Ann's divorce, she swore she had been a resident of Honolulu Hawaii ..now at at least two years past as of the date of filing for divorce -January 20, 1964 when she had not. She was enrolled at the University of Washington in Spring of 1962 and did not return to Hawaii until probably December 1962 or January 1963, making her continuous residency in Hawaii less than two years.