Buu turns the townspeople into candy, sucks them in, and eats them. The town's subsequent destruction is not counted again as the deaths of the same number of people.
Buu knocks Babidi's head off and then erases his body with an energy blast. Babidi was still alive after Piccolo severed his body and dies in this attack.
In a town he reaches after Babidi's death, Buu turns a woman into caramel and eats her, then blows up the town. The woman is an individual included within the same incident and is not counted twice.