images rotating upon upload

I love the intuitive nature of this plugin. I do have a couple of issues. the first time I used it I uploaded a couple of hundred images. Most loaded into the thumbnails and images as expected. A few loaded in a rotated position, some 90° counterclockwise and a few rotated 180°. When I checked the originals, they are all facing as expected. I uploaded the problem images again and they still rotated. How can I get these images to display correctly? Is there a way to return them to their appropriate position from within Joomla?

thanks,

Mitch

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