One theory is that if they are taken in Landscape mode they load that way. (ie when you tilt your camera or phone the long way to take a pic).

Folks who say they load them through a meme maker first are right - that will fix it by realigning it.
This is just one example of meme maker you can use: [imgflip.com]

I thought this had been fixed - I'll note to administration that it's not - maybe they'll get to it in the next round of coding?

@Admin @developer @CS10 any chance of a fix? Thank you!

I have to run all my phone photos through a meme maker to align them correctly

Try loading it on to a computer first, line it up there and then post it, may be the best way.

I find that if I shoot with the phone horizontal it posts right, but when I shoot vertical it turns them horizontal. I think it only understands horizontal.

The phone's round 'home' button is on the right side. This is the only way the iPhone knows how to take pictures without the rotation problem. (If the home button is on the left, the picture will be upside down. ... Unfortunately, if you hold it this way, the receiver of the picture will get it sideways.

I think the problem has to do with the apple phones if I remember right,

Your questions has been asked a few times, and no one has a good answer, or I missed it. I have never had the problem, but I only access Ag.com from my laptop computer. I think most of the picture issues are from using a phone or tablet. Hopefully others will chime in if they have a solution.