when uploading I suspect you opt to “reduce size” of your photos. Don’t do this. When you reduce the size your device strips all metadata from your photos thus servers have no idea what they’re looking at. The server has no clue it’s orientation thus is defaults to landscape.
Next time you upload photos, pass on reducing the size as well reduce them on our end, keeping the info in tact. I’ve reviewed your attachments and hopefully altered the ones I saw that were incorrect. If you’ve got more or come across the issue in the future go ahead and report the post.....I’ll get it fixed.