I've been experiencing the same with pics showing more than once, and I've noticed it in other member's threads too.
Maybe a slight 'glitch' in the system?
Still not too keen on this 'new' photo up-load/management system, and when viewing, it's only possible to view one pic at a time, in the 'slide show' presentation of the pics. It doesn't seem to be possible to scroll up and down to view, for example, two pics in a post, such as when judging the GBs, as could easily be done with the 'old' system.