Before you delve deeper into who understands modes correctly and who doesn’t, and if anyone is interested in reading a comprehensive introduction to the topic, check this out:
Also, I’m one of the last people to complain about too much music theory, but this is a PMT Grade 4 lesson and modes are introduced only in PMT Grade 7. The last few posts may be better placed in those lessons’ threads.
@Richard_close2u I believe some of the posts related to modes and the CAGED system could be moved to a separate thread for the sake of clarity and ease of reference.