I created a layered image in photoshop that measures 11" high by 90" wide. It is four images framed by a white border. When I saved it and went into LR CC the thumbnail has cropped off a significant amount of the image on all four sides. When I export it the image retains the cropping. However, when I open the original file in PS CC the original correct image opens. What could be causing this?
You have some type of Crop Preset turned on. Check the Import dialog window for any Preset being applied.