I think he might have noticed, but not fully realized the implications of it. His behaviour following at least did not indicate that he was concerned about a stall, and there were no further mentions of this warning.
Yep, I would say that, as far as I remember there were also several other warnings at the same time. There were some recommendations in the accident report regarding UX improvements.
I think there was a similar problems at Qantas Flight 32, where the crew had to spend a lot of time going through 54 error messages after an uncontained engine failure.