I am making a powerpoint presentation that has a bunch of screen shots from an excel worksheet. The pictures are supposed to pop up one by one when I click on the screen. Most of the pictures do this but there are a couple that appear before the title does. I also have a slide where all three pictures are there before the title. Why is this happening and how can I fix it?

I'd check your timings for the animations - right click on a screen shot and go to custom animations and you'll see the order they are in. Simply select the screen shots you wish to move up or down the order.