Marv, I'm so saddened to read your update. Sadly it seems some HPV tumours are extremely aggressive and just don't respond to radiation and chemo.
I guess we were lucky in that as soon as the recurrence was found we moved very quickly to salvage surgery. I'm sure that is what saved Kris's life. Our initial reaction to total glossectomy and total Laryngectomy was " no way". But it has saved Kris's life and we are both grateful.
I wish you the best as you go through radiation again.
Tammy.

Caregiver/advocate to Husband Kris age 59@ diagnosis
DX Dec '10 SCC BOT T4aN2bM0 HPV+ve.Cisplatin x3 35 IMRT.
PET 6/11 clear.
R) level 2-4 neck dissection 8/1/11 to remove residual node - necrotic with NED
Feb '12 Ca back.. 3/8/12 total glossectomy/laryngectomy/bilat neck dissection/partial pharyngectomy etc. clear margins. All nodes negative for disease. PEG in.
March 2017 - 5 years disease free. Woohoo!