After reading your suggestion I found that in photoshop when I resize the image to 960 pixels wide and 800 pixels tall, after entering the height, it automatically changes the width to 600 for some reason.
By default, Photoshop will maintain the same proportions of the original image when you resize it. Otherwise, it'll stretch or shrink the image in one direction, making the objects look skinny or fat. If your original image isn't in the same proportion as what you want (960x800),you have two choices:
On the image size menu, uncheck constrain proportions. This will stretch the image when you resize it so the proportions change. It'll make most things look funny.
Or, leave constrain proportions checked, and resize to 960 wide, and let the height fall where it may. Then crop that image to 800 high x 960 wide. This will leave the proportions correct, but obviously remove some of the image.
Edit: I see you figured it out already.