Stupid pad touch screen thing, puts the pics how it wants. Or i am technologically ungifted! Im voting for the earlier!
Your apple product remember the orientation of the device you took the pics on.
it may look fine on said apple device but the pic is still gonna post which ever way you take it.
Open it with a non apple picture viewer like window photo view, paint, or something and rotate it and save it the way you want it then post it