Off the phone, I go to edit mode, crop as desired and hit save. Once saved as we wish to see it, it transfers to the HuntTalk forum correctly oriented.
When working on a Windows 10 desktop, it seems extra important to "save" the changes, as the changes are shown, but for me have reverted to the original orientation/size if I didn't "save" in W10.
I've been known to help other posters rotate their wonky pics from time to time. I screenshot with the iPad, edit, rotate, save and repost.