If you are correctly uploading photos onto Intellirent, meaning your photos are not sideways on your computer before uploading them onto your account, then the issue may be the way the photos were taken.
Landscape orientation photos are going to produce the best results. If the photo was taken in portrait orientation, the photo will be too large on the top and bottom, causing the uploaded photo to present sideways.
There are two ways to correct this at the moment. You can either retake the photo or edit the photo. A quick fix to editing the photo is to take a screenshot.
Then, upload the corrected photo.