So, at least on that first stall, we may have some conflicting informations presented to the crew : an IAS is the "safe" range and a stall warning...
I am intrigued by your <<an IAS is the "safe" range >>. For a fairly dull "line crew", seeing IAS reducing through 100K, but no sign of the Alpha Prot/Max/VLS symbols, that might have a degree of "understanding".
For a Test Crew, briefed and prepared (?), and knowing that Alpha Max was to be 107K +/-3K it is, to me, incomprehensible
Please bear in mind the aircraft was a slight descent, 99K and a pitch attitude of 18.6nu... surely some alarm bells should have been ringing..
NoD