Stigmatas are not "misconceptions" or conceptions. Concepts exist in our minds. Stigmata are wounds on a person's body. Were St. Padre Pio's stigmata, which he bore for 50 years (1918-1968), of the devil? If so, why did he (and St. Francis of Assisi) live such holy lives?
Some videos about St. Padre Pio can be viewed here and here. Here is a video of his last mass.
-A8
Some would say that Benny Hill is a godly man and miracle worker as well. I'm sure the Catholic Church isn't about to declare him a saint. Would you say his work is from the devil?
You’re probably wondering what that has to do with Stigmatas. It has to do with the way Satan is gonna work to defeat God & His followers, but also the reason God would let him mess with some of His very worthy servants.
From the standpoint of Satan, what would be a better way to set up the placement of his minions in positions of power later, than to create “authorized” signs before he makes his final move? Would God let Satan do that? Look at everything God allowed Satan to do to His good servant Job. The why, God will deal with Satan in His own time & He ain't gonna let Satan force His hand.