Unfortunately, sometimes computers and cameras are smarter than we want them to be. Most of them upright the picture automatically, even if it is saved on the side. Please try this. Open the picture in your picture program on the computer and save it under a new file name and upload it again. This should resolve the problem. If not, feel free to send us the picture and we'll try it for you.

Here is an article about this and a possible solution:
http://www.howtogeek.com/254830/why-your-photos-dont-always-appear-correctly-rotated/