I find checking the oil level to be a rather curious affair. Firstly, the dipstick enters the crankcase at an angle, which does not allow precise measurement. The lean angle of the bike when parked on the stand introduces another variable. Any change in the lean of the bike (suspension sag, tire height/profile, or slight uphill/downhill grade tosses another figurative wrench in the gears, said wrench invariably striking the shift detent spring. Was the bike, even though on the side stand, on a level surface? Or was it on a center stand or rear axle spool stand?
Remember Emerson, Lake and Palmer's song, "The Endless Enigma"?