When it was time for all chores to be finished, so you could check them, no one had done the small trash cans that were their chores. You check the chart, and it was Kevin's day to do it. However, Kevin says that he hates doing the trash, so he and Stan had traded. Stan says Dylan owes him a favor, so he told him to do it. Dylan says he's already paid the favor back, and besides, Kevin still owes him a dollar.
That's their stories, and they're sticking to 'em - what are you sticking to?