Flaps:
I'm no supersonic pilot, but here is my laymans understanding of flaps on supersonic wings.
A subsonic wing has a rounded leading edge, to minimise airflow separation over the top of the wing at high angles of attack.
A supersonic wing has a much sharper leading edge to minimise shockwaves at the leading edge in supersonic flight.
Therefore, the supersonic wing is much more susceptible to airflow separation at high angles of attack when flying subsonic.
Hence, training edge flaps are often used in subsonic flight to reduce angle of attack - at speeds up to M.9 or so.
The use of flap throughout this manouevre is probably normal.
Those with more knowledge may enlighten us for this particular aircraft.