I don't know why, when one uploads pictures that are properly aligned, ATP rotates them. It happens to my pictures all the time. The only way to know is to look at the "preview" and see if the picture is right. For example if ATP rotated the picture to the right, and the picture is now on its side, I delete the picture, go back into my Kodak Easy Share, rotate that picture to the left, and then when I re-upload it, it will be properly aligned. Perhaps there is a better or easier way to do this, but that's what I do.
Perhaps one of the computer experts on ATP can tell us why our pictures get rotated.