"Play through both 1st and 2nd scenarios of the characters in a single segment."

So does this allow to complete the first run, then you're able to start the second run, but then you reset the second run, complete it and that still counts as single segment? I would assume that would be a failed attempt, thus you would have to run the first story again.

It is all one go... so if you fail the 2nd run then you gotta start from the first scenario

@Ziozu I would just play the menu control safe , thankfully the runs are all based on in game time so there's no reason to rush scenario select.