I submitted a request this morning relating to two different flights. Different PNRs. My wife was on the same flights, on her own PNRs.

I entered all of the details in the fields, then used the notes field to flag for them the second flight as well as my wife's flights (just gave them my wife's Aeroplan number and said she was on the same flights).
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All of the flights were fixed without any further form-filling on my part.

I have used this approach in the past as well.

When you use the web form, it just seems to send an e-mail to someone at AC Altitude with the info you fill in, for manual processing...

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