I rotated your original photos (only admins can rotate an existing photo and due to the server caching, it can take a day or two to show up).
The rotation problem exists because some devices use a special flag in the image header to tell the operating system (i.e. iOS, Mac OS, Windows, etc) which way is "up" (as opposed to the early cameras that didn't try to rotate the image at all, or the latest ones which generally save the image in the correct orientation). Websites don't usually read this flag, so whilst the image looks the "right way up" on your device, it'll end up in the orientation it was originally captured in when uploaded to the site.