Few questions: Are you using the out of the box from Adobe bounces here? How are you calculating this on the backend?
Adobe will not count a visit as a bounce if they clicked on any link while on the page.
So even if they only saw the one page, if the engaged at all then it isn't a bounce. I have heard more than once that bounce rate is becoming a les valuable matric because companies are trying to feed everything a user may want/need on the one page and there is a good chance that the user doesn't need to go to another page. In general I would suggest measuring engagement on the page rather than bounces.
