Thread:Artful Dodger/@comment-4651179-20160218234954/@comment-100066-20160220133438

This appears to be unique to this volume. Years ago, we had many images which were improperly named Vol 2 and those cover images are now redirects to Vol 4. I created the Deadpool Vol 4 15 page to check and it autopopulates with the redirected Vol 2 image.

I think this is what the problem is, but I am not 100% sure. You should go through the future Vol 4 images and see if they already exist as redirects and then delete or correct them.