Joomla 3.5.1
With 2.7.0, Showing events shows a single past event in the list of events even though "Past Events" is set to "Hide".
I tried changing it to "Show" (which worked to show everything) and then back to "Hide", which again showed one past event and the remainder current and future events.
Please check event end date of that event. If the end date is greater than the current date (mean the event is still occurring). we will still show it.