@High Seas,
Okay -- "reply" and "edit" can be confused with "preview" and editing a draft. It has happened to me, too.
About my signature -- no, I'm not going to edit it. First, it's a verbatim quote. I don't correct quotes except for egregious errors. Second, I looked up the
off of construction in Bryan Garner's
Modern American Usage (Oxford University Press 2003). Although it labels
off of as "much inferior to
off", it doesn't say that
off of is incorrect. This doesn't rise to the level of an egregious error, which I would correct in a quote.