Dolphins Cheerleaders Make "Call Me Maybe" More Than Tolerable

Saying anything about this video would only ruin it, but I'll take that risk to point out a few things.  I'll wait the three and a half minutes for your attention...

At 0:28, did anyone notice anything strange?  Anything at all?  Maybe the four-year-old girl standing in the ball pit?  The only other thing, which completely confuses me, is at 2:00, when there is one continuous shot, yet there are four girls in two positions.  How in the world...  Yes, you can watch it again.