StandbyFlowControl
Monarch said the plane was being taxied to the terminal when "one set of wheels left the taxi way bringing the aircraft to a stop"
Gotta love the Monarch
PR understatement!
Yep, coz they haven't yet factored in Pax with camera phones and access to Facebook, YouTube, Twitter and all the rest whilst still on the a/c, waiting to egress. Tell the truth first time - it's cheaper.
As to the slats retracted question:
IF their procedure called for retraction as soon as 'taxi from runway' starts, they might have thought that they had it all under control and moved the lever. By the time they came to rest (stopped swearing) and shut down, the slats could have run all the way in??