What if Guru Nanak visited couple of places lesser then above list? Will his greatness be reduced? Not at all......He doesn't need list of places or big list of names to prove his greatness.
But if couple of names in this list are fake or need more citations then his followers are surely putting a bad name on his teachings.
I never heard about Baba foosa or Nanak Kadamdar. Even the Nanak Acharya in Sri lanka is still debatable.