So, you've uploaded images into your Image Manager, and they appear sideways, even though they looked correct before you uploaded them.
What often causes this issue is that the phone writes the rotation in the EXIF but doesn't actually rotate the file as it should. When Photoshop, Lightroom, Bridge, etc., read the EXIF, they recognize that they need to rotate the image before displaying it. Unfortunately, web browsers cannot read this and will display the photo without understanding that it has to be rotated.
Solution: Simply re-saving the photo in Photoshop or re-exporting it from Lightroom should fix the problem.