Hmm? Well if it's shown as s-on but you are In fact s-off surely that's a bonus?
Try an app that requires s-off to check if you are, or maybe try supercid as you need s-off for that. That's all can suggest.
Htc One Mini | PAC-man | TWRP 22.214.171.124 | HBoot 2.22 | S-OFF | SuperCID | Gapps by BaNkS
Htc One M7 | Candy Kat Rom | TWRP126.96.36.199 | HBoot 1.57 | S-OFF | SuperCID | PA Micro Gapps