You’re right. I misspoke, conflating the events. One or more sources put the change from Barry Soetoro to Barry Obama about 1980 and the move to Hawaii. Other sources, such as Newsweek, go into a long story about a long and drawn out change from Bar (his immediate family) and Barry Obama to Barack Obama (Eric Moore and others) during the Occidental College period and later.
That’s OK. It’s hard to keep all thes facts and conflicting pieces of info straight.