That's not the way that I remember it. From http://www.imsdb.com/scripts/Star-Wars-The-Force-Awakens.html:She told Hux he was ordered, but never showed up, to reconditioning. That is because he went to save Poe instead. When would she ever have a chance to reem him out?
INT. STAR DESTROYER MAIN BRIDGE - DAY
Captain Phasma and General Hux stand before a holographic
projection detailing FN-2187's service records.
CAPTAIN PHASMA
FN-2187 reported to my division, was
evaluated and sent to Reconditioning.
GENERAL HUX
No prior signs of non-conformity?
CAPTAIN PHASMA
This was his first offense.
Captain Phasma and General Hux stand before a holographic
projection detailing FN-2187's service records.
CAPTAIN PHASMA
FN-2187 reported to my division, was
evaluated and sent to Reconditioning.
GENERAL HUX
No prior signs of non-conformity?
CAPTAIN PHASMA
This was his first offense.
Nowhere is it said that he never showed up. Honestly, to me, that sounds like he went.