This is a weird one, booked YUL-LAX-LAS yesterday and today I have on my PNR page on AC a "upgrade to business class for only 207$ CAD" and this indicates that it's for the whole trip and not one leg only. But as soon as I go to checkout the webpage crashes with an error. Is this a glitch? 207$ is very low for a 8h44min route (with an hour layover). And the lowest "bid" price acceptable on the "bid to upgrade" is 600 $ CAD.