This is something I just don't understand about Ebay... ALL of my photos are upright in my camera, and on my computer. When I upload to Ebay the vertical ones get rotated. This has only been happening for a couple of months. Before that, they uploaded just fine. Thanks for the extra work, Ebay!
That use to happend to me when I used my iPhone for photos before I got a Dslr. I had to go into the photo from my computer and rotate it all the way around (even tho it was the correct position on my screen) then save the image file, then upload to eBay. That fixed it for me.
But like I said, ever since I've been using a new camera, i haven't ran into that issue
Some cameras, including the one in the iPhone, use the EXIF data - specifically the Orientation tag - to set how a photo is oriented. And to make things more complicated, some programs and browsers read that EXIF tag and use it for how to display the picture...and some don't. Ebay probably changed how they handle the EXIF data recently.
I found a program called EXIF Editor that helps, since I take all my photos with my iPhone. I upload them all to the computer, use EXIF Editor to set the Orientation tags to 0 (you can do it en masse), and then use an image editor to rotate them however I want them when I'm doing my other edits.
For WAYWRN pics and other shots that I want to post from my phone, I edit the pics in the PS Express app, and when it saves the files it saves them without any EXIF data. That's too clumsy to do for a lot of pictures at once, though.