However, I'm quite sure these entries have something to do with people remembering him as having been a day scout at some point. Should I change them?
Onni
positively hasn't done any scouting ever since he arrived in Keuruu:
Not being immune, he is also
fundamentally unsuited to be a scout, and has
shown strong aversion to stints into the Silent World even before whatever forced him to flee Saimaa. His job in Keuruu - and probably a thing he has been trained for for
longer than those eleven years - is to be a
defensive mage, as in, holding a fort. I don't remember ever seeing authoritative claims for him to have been a scout, and would be very surprised to see any.
But no, there's no
outright statement that he has
never done any scouting, and he
did somehow trek from Saimaa to Keuruu with Tuuri and Lalli before figuratively throwing away the keys to the walls of Keuruu.
The quartet
wanted to hire him and send him into the Silent World, as a
mage, maybe deluding themselves into thinking that he could double as a (day) scout, but he wholly rejected that offer.