The child has at its disposal a variety of ways to try to achieve the maximum number of changes in a day. It will use each and every one of them at every opportunity. It is ruthless in its pursuit of what is called, 'The Look.'
Wash a load of baby clothes as soon as you have enough to justify it. If you wait too long, you'd be surprised how quickly you can end up down to your last oufit for bub.
Also, more than one pattern per outfit is always a fashion no-no.