That's not correct. The second article you quote is only about West Antarctica while the first is about the whole of Antarctica.
Revisiting this point; his quoted statement mentions specifically “Our main disagreement is for East Antarctica and the interior of West Antarctica – there, we see an ice gain that exceeds the losses in the other areas.”, so I'm not so sure that's correct, especially as the study based on more recent data showed increases in loss rates.
http://onlinelibrary.wiley.com/doi/10.1002/2014GL060111/abstract
However, I don't know if they were for the exact same locations as what he was talking about.
Presumably he made this statement recently, but was he accounting for the data that went up to 2013, or was that statement only about earlier studies that went up to 2008? And if so, what was the point of this study being released for public consumption at this time and in this way?
It's a pedantic technicality, only of interest to climate specialists specifically studying melt rates in Antartica pre-2008, that has been made pretty much irrelevant by the studies done more recently which address the only thing the general public wants to know - ie. 'how bad is it NOW?'
In terms of public consumption on facebook feeds it's completely counter-productive and being used by rabid partisans as ammunition to gleefully mock those who accept the consensus, while they at the same time dismiss all his qualifying remarks and the studies based on actually relevant years.