The way I remember this is you can only buy doe tags for the season's you buy your statewide tags for. Only exception are the special Antlerless only seasons which this year were Thanksgiving weekend and After Jan 10th. Then you have to buy your 2006 license early to hunt that one.
If I were to get a vote into how to do these tags next year, they should make the antlerless tags good for any season you buy your state wide tags for. So, if I buy Bow and Shotgun 2, I can buy an antlerless tag that is good for both of those seasons.
Of course that would probably reduce the revenue the DNR would get because I normally only want to shoot 1, but end up buying 2 tags just in case.
On a side note, I'm hearing a lot of guys saying they are shooting a lot of button bucks by mistake during shotgun season. After a couple years of this we'll have to see how the war on Does is costing us some great bucks.