I have the same issue when uploading from Win8. I can crop and rotate it in paint as much as I like, but when I upload the pic straight here, it twists it back to how it was originally.
I know Win8 auto spins it the moment you upload it to the comp, but its uploading here that it goes back to how it was taken on the phone/camera.
The only other way I can do it, is if I upload to photobucket, and copy the link from there.