I have two checkbox fields in a list view layout that are set to have a dark background color when the value is equal to "Yes". They are not modified by any script and they function only when selected by the mouse pointer.
Here's the mystery. Within a found set records the background may appear or it may not when there is an X in the checkbox. Box 1 and 2 on the same line always match in terms of background on or background off. I've attached a small screen capture (gray lines are sub-summary rows).