The Mystery of the Peanut Butter Spoon

Addie ate way too much peanut butter on June 4th. I know this because when her mom left to go to swim practice with her brother, her mom left out a plate with a spoonful of peanut butter on it. After she left however, Addie ate another spoonful of peanut butter with one spoon, got another one from the drawer, ate a spoonful more of peanut butter, and did that one more time. When I went to go look in the sink, I spotted one spoon in there and the other two... in the dishwasher? Why did Addie put the other two spoons in the dishwasher but not the one?