You shouldn't directly compare the yield on an offering that was made in Nov 2013 for "up to ~13 year" bonds (according to your linked article) to the yield on

You shouldn't directly compare the yield on an offering that was made in Nov 2013 for "up to ~13 year" bonds (according to your linked article) to the yield on an offering in Oct 2014 for what is reported as 5 to 7 year maturities. Different maturities, different yield on the 10 year treasury benchmark, different investor sentiment for risk (10y bond yields are at the lowest point YTD right now as we see a "flight to safety" over the past weeks), etc. Obviously neither of us has enough information to do a proper analysis in pricing these bonds, but even so, I would be wary of employing that kind of direct apples to apples comparison in this context.