If it was just missing my name name and DOB I would just write that in. It's more the guarantor section that makes me nervous.As the other poster said, I am sure it will be fine if you just write it in yourself, save on the gas!
Perhaps don't be too harsh on them, they probably only ever do passport photos and rarely if ever see a PR photo!
Also I'm now thinking that maybe the photo spec is wrong if they did it thinking it was to be a passport photo. Maybe it's the same spec for a passport I don't know but anyways.. Better safe than sorry!