On both bikes my method is the same.Not wrong if you can pull it off.
Can you explain your technique?
1) be on / over the bike
2) stand the bike upright wth the kickstand down (for safety, in case she tips over I always try to favor tipping to the left)
3) butt lightly on the seat, left hand on the left side handle, right hand on the throttle grip, right foot on ground, left foot on centerstand peg.
4) put the center stand down with my foot and adjust the bike right-left. Make sure it's level and both sides of the centerstand are planted squarely on the ground.
5) push down HARD with the left leg while pulling up&back with the left hand. Right hand helps balance but not much else. The left leg does all the work.
At this point the bike will be moving backward and as long as you keep it balanced it will rock back onto the centerstand. It helps sometimes to park on a slight incline with the front wheel higher than the rear. Never try the opposite. :
I've always been afraid to do it off the bike because if it were to fall over I have no way to stop it. I can keep it balanced if I'm on it.