Blank slide with CPO Content Types

I set the photo for the main homepage slider of andrewjlyon.net (using the plugin CPO Content Types) the edited the photo and wanted to update the slider. I had only set the one, original photo for the slider as a static image, but then I couldn’t remember for the life of me where I had set it. There were no slides created, and I couldn’t find a setting for it anywhere else. So then I created a slide with the new image, and now, the slider has two stages – the image, and a blank. If I add more slides, there is always a blank one at the end.

Can anyone help me with this? I only have the one published slide – none in the trash. The template is Intuition. I am not using discus. Thank you!