There is a prev/next button but only for images in an album. There won't be a prev/next button on the image viewer related to listings, what I will do is listings with full screen viewer but that is something different.
I like you suggested and got the same response, however see those buttons necessary.
On the other hand ... when you open the first image in an album shows the 'Previous' button, and had to show the 'Next' button.