Multiple images showing up on the display moniter

We have had an ongoing issue with our screens. When we set up a presentation with just one image, another images shows up behind the image to be displayed on our display screen. Any thoughts on why that second image is showing up in the background?

Here is what we do to set up our presentations:

Create a new presentation

Add placeholder (an image from our files)

Set the size of the screen and the background.

Save the presentation.

Add it to the schedule.

Each presentation is set to play for 10 seconds. 

When presentation goes up onto display screen, a second image appears from a previous presentation that was deleted from that schedule before uploading the current presentation. 

Any help would be appreciated!