The current finance minister says they cooked the books: yanisvaroufakis.eu/2014/04/24/greek-statistics-are-back-primary-deficit-presented-as-surplus-with-eurostats-seal-of-approval/
Your link is about a 2013 budget surplus and not 2014. The reason eurostat did those adjustment was too eliminate one off expenditures that would not continue. And they didn't continue in 2014.