The use of your buck tag for an either sex tag in late flintlock was set up when the flintlock season was first introduced. If you bought a ML stamp then you had to forfit your doe permit.
Being this is no longer ths practice some hunters are asking the same question as you. If the game commission would give the flinters an early season for them only to hunt bucks like archers have I could see archers having the same use of their buck tag in the late season.