Sounds similar to this:

https://www.flyertalk.com/forum/othe...t-tickets.html

I've never experienced this myself, but it seems like this may be due to AC's branded fares.
Since all the other *A FFP gets is a fare class, there's no way to differentiate between V,Q,W booked in standard, flex, comfort etc.

Translating standard domestic V,Q,W to T class may be AC's way of limiting miles earned. Especially, considering a handful of *A FFPs I looked at give 100% miles for V,Q, and 50% for W, Whereas AC is only giving 25%,