For passport photos, only one photo should have the applicant name where as in citizenship app both photos should have the name at the back.I believe PR app, citizenship and passport photos requirement are the same. You can confirm the photos he has given you and compare with the citizenship spec form online. That being said, most studios have the generic stamp with the address and date and it has the signature of garaunter field. This is required for passport photos so you can ignore that.
Don't think this is an issue but you can confirm your specs with the citizenship app online and they should be fine.