Children don't want to do what they don't want to do. Whether it's tidying their room, taking out the trash, or putting on their pajamas, if a child doesn't see the need to get a task checked off of your list -- or they simply don't feel like it -- she will do her best to avoid it.
They thought it looked good!
Maybe your closet isn't big enough for all of your clothes. Maybe you have a shopping problem. Maybe it's both. Whatever
Children make messes. They move from one activity or outfit to another, rarely considering that by returning whatever they were playing with or wearing to its shelf or drawer, they could easily keep their rooms clean. "Later" becomes their motto.