I have edited posts a minute later and they say they epwere edited even when I gave no reason. PGs post was edited after others had commented and no edit was noted.
I often do not give a reason, spelling, BS answer originally etc and still it says edited. You have a short period of grace before the edited notation is added. The
PGs post mentioned two CPS and only one was viewable later.
There was nothing wrong in the post and I wondered why it had been changed, it made my post and others posts seem wrong.