Rick Jones used his keyboard to write :

So the second stage of the rocket system that has a first stage which
can supposedly "complete the mission" if it loses two engines,
ended-up without enough propellant to complete the mission?

Where did you get this from Jeff's posting? Upthread, he notes there
was fuel available, but that it wasn't used because off possible
conflict with ISS trsjectories.

/dps

--
Who, me? And what lacuna?