I saw that picture. But to me the right eye looks brown and you can't SEE the left eye, why does the OP say it is blue. (Are my screen cloors THAT messed up?) With the angle of the picture, the "lightness" showing where the other eye is could very well be a reflection off of the light colored building she is laying next to.
not sure if you guys have noticed that the link has been updated and there is now a photo of her showing the blue eye. i wouldnt think that the owners would lie about it tho - obviously the potential adopter would show up and see that the dog either has a blue eye or not.
but anyway, its too bad that you guys decided not to take her. she's adorable & looks as Brightelf described which would explain the eye.
I don't know enough about genetics to explain how a blue eye may find its way into a German Shepherd, however, I read on the panda shepherd site that blue eyes are found (and allowed) in that "breed", and some of their dogs have one blue eye. It would stand to reason that, if they are actually German Shepherds, it would be possible to see blue eyes in traditional colored Shepherds if the right genes combine.