Here is another glitch; e-up did not clear at T - 36, went to check in at T - 24 and the website posted that my flight had been cancelled. After a freakout, I called AC Reservations, who told me, that when your e-up is cancelled for some reason the website reports that your entire flight has been cancelled. The agent assured me that all was well, except for my OLCI glitch which I have commented about in another thread.
The only silver in lining in this is that AC reservations answered right away, no wait time.
I also note that on the standby / upgrade list on the app the same names appear on each of the lists, suggesting that it is only non rev that can be waitlisted for the upgrade after T-36, as has been suspected.