The requirements of phtograph for US passport are quite different from Canadian. The canadian is more strict. You can tell this by looking at how tedius and radiculous it is for a Canadian
who does not know a doctor or a dentist more than 3 years and wanting to apply for a Canadian passport, even worse, when you renew your canadian passport, you
have to go through the same procedure again. It's pain in the ass. Comparing with US passport application, it is much simple and efficient.
Back to the subject, many US cities does not know how to take canuck style passport photo. I bet even you tell them to follow the specific requirements, they might
not be able to do it because first they've never done this, second,they might even do not have those facilities such as stamp, printing machines etc.
who does not know a doctor or a dentist more than 3 years and wanting to apply for a Canadian passport, even worse, when you renew your canadian passport, you
have to go through the same procedure again. It's pain in the ass. Comparing with US passport application, it is much simple and efficient.
Back to the subject, many US cities does not know how to take canuck style passport photo. I bet even you tell them to follow the specific requirements, they might
not be able to do it because first they've never done this, second,they might even do not have those facilities such as stamp, printing machines etc.