Double Background Image Issue

Hello,

I have what seems to be an odd issue with two backgrounds on a slide.  Here's what's happening.

1. Recorded a project.
2. Needed to replace some of the background images.
3. Recorded the new background images with another project.
4. Copied the background image from the new project.
5. On the old project I right clicked, and pasted the new background image.  It doesn't really looke like it pastes proerly.
6. When you play the slide, the old bacground image quickly flashes and then the new background image plays for the rest of the slide.
7. If I "find" the background image in the libary and then delete it.  It deletes the image but on the slide it shows a portion of the slide just white and part of the old background image.

I've made a little video that hopefully helps clarify what I'm trying to explain.  Any assistance is appreciated.