It's my understanding he was there for a month or so...but more important than how long he was there, is what was the purpose? There have been suggestions made that an adoption in Indonesia was annulled. That the kenyan was brought to Hawaii to object - on the grounds he was not consulted.
That name Soebarkah, removed from the passport docs, suggests an adoption by SOEBARKAH, not SOETORO. There may have been a family court hearing during that visit, and an adoption annullment would have returned his name to what it was according to the 1964 divorce documents.
Is Soebarkah a different name (apart from spelling) than Soetoro? If so I wasn't aware that there was suspicion that it signified a different person than Lolo Soetoro.
Only a look at the actual source documents at the HDOH will ever settle it.