If a user changes their details on the site it isnt updated with update without moving back up tree/down again.
a) If you are looking at the user "Details" and click update, the new information does not update the page/display.
It only updates if you "back out" of the page to the course listing of participants and go back in.
b) likewise The Course listing of participants information (names) does not update unless you back out to the list of courses, and go back into the course.
This may be by design(not sure) but seems odd to me as user, If i click update i expect the changes.