I was having a lot of trouble getting the HTML content to display rather than just the caption. In case someone else runs into the same issue, I wanted to drop in this note.
It turns out that my problem was having a link associated with the slide. I had to clear out the "URL Link" field within the Orbit Slider Options. Once this was clear, then my regular content showed up.
It would be helpful if there was text next to this field saying "leave blank if main editor content is being used" or some such message.
Apologies if this was mentioned some place else and I just missed it.