Ability to re-rank Features on the Board by Master Feature Rank

When I re-rank a release on the Feature Board, the items get grouped by Master Feature name, not ranked according to the rank of the Master Feature, as I would have expected.  I suggest changing the label on the Re-Rank By menu to say "Master Feature Name" instead of just "Master Feature."  I would also like the ability to re-rank the Features by the rank of the already prioritized Master Features.