The original paper by Vogt et al was peer reviewed and published in the AstroPhys Journal. Reference link is
here.
Its a good paper, and they make reference to the possible measurement uncertainties. The wording about Gliese 581g is very careful and cautious.
There is room for further interpretation which, I guess, is what is now happening via the IAU.
I'd say the media release and whatever the media has done to the story subsequently, has resulted in the 'surprise' that further analysis will be necessary before they can confirm the existence, or otherwise.
The Bhathal SETI signal observation (last year) would seem to be a separate item (for further investigation).
Keep us updated Chris .. I'm fascinated to know what his viewpoint really is (ie: straight from his own words).
Interesting.
Cheers