Islandpixie,
Thanks for posting this. I've discussed this issue with our engineering team and we are able to recreate the problem you're experiencing. The problem is related to the state of the Accordian panel that holds the Thumbnail slideshow. If the slideshow/lightbox triggers are in a panel that is open on initial view, the large images (the "heroes") will display in the right order. If the slideshow is nested in an Accordian panel that is initially closed, the first image in the slideshow will appear first regardless of which trigger thumbnail is clicked.
The only workaround we have at this time would be to use the Lightbox Composition widget instead of the Slideshow widget. This widget does not cause the same issue with hero order, however it will be more work to setup your slideshow. It will require you to create your own thumbnails for your triggers, then associate your hero image with the trigger (whereas the Thumbnail slideshow does this automatically). Here's a brief video on working with the Lightbox composition widget: http://muse.adobe.com/video-create-a-lightbox.html
Thanks for your patience.
Best regards
Corey
