They never answered me on this, either.
After an extensive period of looking through their PHP/JQuery, I was able to successfully make it assign individual IDs for each instance. When that didn’t work, I eliminated IDs altogether in favor of classes. This also proved to be a futile exercise. In the end I created a new WordPress page for each instance, and iframed them all into one page.
Kind of crazy considering multiple instances typically just work, but iframing got the job done. Good luck!
