Welcome to all Philosophy Forum- new A2K members.
Edit function takes awhile to get used to. When you edit, a timer is set. If no one ELSE replies (after your initial post) before you re-edit, you can edit a few times. I don't know if the timer is 5 mins. but that timeframe seems that might be the case. I edit often as much as 4 times before the times times out.
I just saw all the replies, particularly new user info about RG set your defaults.