I'm so glad AC's website is very clear when you're looking at a mixed cabin redemption.

I'm obviously going to book the one that has the AC flight in F, because there's no way I could tolerate AC J.



For the record, the real issue was a MAA-DEL-SFO that did not have the indicator, and only had F for MAA-DEL. The screenshot with an AC segment is just more blatant.