I believe you are correct. If you HAD reset the notification when you changed the oil, then I would pay attention to it. But it is asking you to do the 1st oil change, not realizing that you already did.

I have a similiar system on a BMW, and it works just like your option 2. I know this, because it has a little countdown on the dash with 4 green blocks, a yellow, and a red. If you change the oil without doing the reset, it will just continue the countdown.