It seems that your view that as an adult “there was a time when he did NOT consider himself to be a citizen of the United States of America.” is at best your opinion unless you have just neglected to spell out some law or point out where that would really revoke his US citizenship.
Again he could of been ignorant of Indonesian law and unaware of what it appears to be to outside viewers such as yourself.
No, no, no, no - you don't understand.
The theory is that Barack Jr travelled to Pakistan, to visit his mother [who was at that point separated or divorced from Lolo Soetoro, whom she left behind in Indonesia], in 1981 [while he was an undergrad at either Occidental or Columbia], as an adult [of the age of 19 or 20], and that when he made that trip, Barack Jr carried on his person an Indonesian passport [the passport of a nation that does NOT recognize dual citizenship] which identified him as Barry Soetoro, a citizen of Indonesia.
This would have been a document that Barack Jr would have held in his hand, and stored in his breast pocket, and flashed to the immigration & customs officials at every international airport where he embarked and/or dis-embarked.
Which is to say: This is not something that the adult Barack Jr could claim he did not realize - he would have held the document in his hand [and frankly clutched onto it for dear life - no one would want to get stranded in a strange & violent nation like Pakistan without a passport] and he would have opened it and displayed it and read it on many, many different occasions.
And if this is true, then there should be a record of it somewhere deep in the bowels of the State Department, and TexasDarlin is hinting that "People in the Know" say they've found the documentation for it.