the perc self option continues to output that I don't sense any spells even when I am sensing spells. Similar results seen with pow self and conc self.

>perc self
You sense the Sure Footing spell upon you, which will last for about six roisaen.
You sense the Ethereal Shield spell upon you, which will last for about six roisaen.
You don't sense any spells in effect on you.
Roundtime: 6 sec.