The sessions are separated but we have listings that include both sessions or just each individual session. You can find all the dates and session breakdowns here.
So if you buy the "All Sessions" for a specific day, it'll be all of those. So if you bought it for the 16th, you'd need to purchase again for the 18th, unless the listing itself advertised the entire weekend or 3-day timeframe.
Hopefully that helps, but if you have more questions or if we can clarify anything further, please let us know.
