Image size you upload impacts orientation in a random manner. The larger the image, the more likely it will be on it's side or upside down.
I have found that a 3" x 5" image under 200k posts correctly and that is big enough for most folks to see what the object is.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels