Let me try to explain it another way
If you have switched to picture 2 of a product, and you then select product options that should show you another image to fit the selected option, only the first image is switching.
so if you are not seeing the first image, you wont notice that the options should change the image.
i hope this clears it up, if you want more information, i can provide you with a link and a temp user to see the issue