Download the Crappie.com app and post your new pics thru it. Test a newly taken pic in the Testing Forum to see if the orientation is correct. If it is, then you're good to go. I don't believe, however, that previous pics will be corrected using this method.
It is believed that because of various updates (on phones & this site) that sometimes this site does not recognize the orientation code of some phone pics & tries to correct it .... leading to the pictures being turned to the side. (layman's explanation)