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 | Candy Rom | PhilZ Touch Recovery 6.48-4 | HBoot 2.22 | S-OFF | SuperCID | Dirty Unicorn Gapps