Lyman, all values are recalculated in real time - don't think of it as a home computer where tasks are prioritised differently and the machine will slow down as it has to process more. These computers are designed to process all the streams of information without missing a beat.
In answer to your question, the STALLSTALL at 02:10:10 was "G" induced and was silenced almost as quickly as it appeared. The *next* STALLSTALL was the real deal, however - and stayed on until the aircraft was well outside the designed operating envelope.
An updraft may mess with the AoA, but crucially the flight path does not indicate a climb of this nature, and nor does the DFDR data. This was a commanded climb.