I’m sure it’s not just me, but when I upload photos to the website from my iPhone 7 they post sideways and I can’t fix them. Any ideas why and is there an easy way to fix them?
I wish I could help you out but being that this has never happened to me, I'm not sure what the problem is. Have you tried uploading a smaller image? As in, rather than trying to post up the "best" quality version of your photo, try uploading a smaller one. You can use this thread as a test.
In my experience, when I try to upload a pixel dense picture in landscape mode, it always flips to portrait mode. In order to fix this I use a picture resizing app on my Android devices.
It may also depend on which way you were holding your ohone in landscape. Top of phone left or top of phone to the right. If its to the right, that may be giving the photo the wrong X Y axis and rotating when posting.