I have jpeg images from a canon 10d that are later saved in tiff format. The tiff images in browser ps cs have an automatic rotation applied. I have tried opening, rotating and saving, /and rotating, applying the rotation in browser but either produce the same results : auto rotation is applied again. Can I switch off auto rotate?
I think the problem may lie in your camera software. Some digital cameras detect and save the camera's Orientation for each exposure. This information is stored in the image file as EXIF data ( a form of metadata). File Browser recognizes the embedded data and attempts to "help" you by rotating your images to match the camera's assumption.
Check your camera's documentation. Your Mission: Find the option to turn this feature OFF. Unfortunately, I am not that familiar with Canon cameras (I've always been a Nikon guy). I hope this helps.