Since 2005? Wasn't that one of the hottest years in the US due to a very warm el Nino?
Sea Ice? What matters in Antarctica is the Ice trapped on land, and that is still melting into the sea. Fresh water freezes at a higher temperature than salt water. So I would be suprised if that is one of the reason there was an increase in the sea ice.
Antarctic ice is at record levels, not sure your concern.
Sea ice, which melts every year. In the meantime, the continental ice is decreasing by billions of tons yearly.
http://skepticalscience.net/pdf/rebuttal/antarctica-gaining-ice-intermediate.pdf
Measuring changes in Antarctic land ice mass has been a difficult process due to the ice
sheet's massive size and complexity. However, since the 1990s satellites have been launched that allow us to measure those changes. There are three entirely different approaches, and they all agree within their measurement uncertainties. The most recent estimate of land ice change that combines estimates from these three approaches reported (Shepherd and others, 2012) that between 1992 and 2011, the Antarctic Ice Sheets overall lost 1350 gigatonnes (Gt) or 1,350,000,000,000 tonnes into the oceans, at an average rate of 70 Gt per year (Gt/yr). Because a reduction in mass of 360 Gt/year represents an annual global-average sea level rise of 1 mm, these estimates equate to an increase in global-average sea levels by 0.19 mm/yr, or 1.9 mm per decade. Together with the land ice loss from Greenland, this represents about 30% of the observed global-average sea level rise over this period.