Ok, do I have this right? I can no longer upgrade a complete portion of my Itin at the same time?

I regularly fly yyt-yyz-yyc.

So I would have to check twice to request an e-upgrade? One at yyt-yyz -4 days and again at the yyz-yyc - 4 day mark?

So essentially, twice, 3 hours apart?

That can't be right....