Post with NO featured image and two attached images

This post is in the Featured-Images category… although it doesn’t have a featured image. It has two attached images:

1. The banner image for the oik-batchmove plugin
2. and the banner image for the oik-video plugin

When this post is displayed in the nivo slider then the image that is displayed is selected randomly from the attached images. When the post is displayed in the Feature Images category it’s the theme that decides which image to display.