D.C. Musicians Overcharged on Per Capita?

The 2007 AFM Convention approved a one-time $2 increase in per capita dues.

But Local 161-710 in Washington, D.C. is charging $2 per year from 2007 through 2010 — a total of $6.

Is this merely an error? Or is Tom Lee's hometown local attempting to twist the Convention's action to extract $4 more per member from our ailing locals and musicians?