Remark: The actual divergence powers

The codimension is two. Thus $r^{-4}$ produces an ${\epsilon }^{-2}$ divergence and a logarithmic second-jet subtraction, not an ${\epsilon }^{-4}$ divergence. For the circulating vector, the prospective ${\epsilon }^{-1}$ term has zero angular moment; only a logarithmic first-jet subtraction remains.