You mentioned that the account must not be the one you use on a normal basis -- why is this? In other words, how does this fail and what problems would it cause? I'm currently using it this way and trying to trouble shoot items.
I'm also not certain why it needs email confirmation followup -- i.e. why the site says "This account is pending email confirmation." I'm also in the middle of getting my email relay set up, so I'm not receiving any confirmation messages yet; I'm not certain why that's needed since other OAuth2 services don't do that.