By all means feel free just to chat in the guestbook - as long as it's not spam!
Anybody with Admin below their name is definitely me or a trusted person. I myself will always sign as Butterfree. If somebody signs under that name but does not have the Admin label, it is most likely an impostor.
Usually I don't update the site talking about chapters of that fic, since if people are following it they can just check the fic minipage (which does post updates when chapters are posted).
Then, you must feel guilty often.
Did you write those last three chapters all in one night? Because I never saw an update talking about them until now.
For not updating my site enough? Whenever it goes unupdated for a week or so, I start feeling like I'm neglecting it. :/
…Why on Eath would you feel guilty?