multiple values in single image bug

I've had situations where a single image shows 'multiple values' though only the one is highlighted. I called Adobe tech help and they said that it is because its empty, I showed that wasn't the case, as empty ones are black. This should occur when more than one image is selected and the values in a box differ. I have also had this happen when I copied a single description and pasted into the rename box and it showed multiple values. How can one image have multiple values?