If it is a earn a buck unit you need to shoot a doe before you shoot a buck. You cannot shoot a buck until you shoot the doe first. If you shoot them on the same day that is fine you just register the doe first, get your earn a buck sticker and stick it onto your buck tag then register the buck after the fact.
This is only if it is a earn a buck unit!! Which there are several. You will have to look at the map to find out on the dnr web site. If not it does not matter.
Also if you shoot 2 does you will have a extra earn a buck sticker that can be used for next year, or archery / gun hunting. Whichever you use first. You have to shoot 2 does a year to shoot 2 bucks a year. One for archery and one for gun. And these are carried over to the next year if you do not use them in the current year. So do not lose them or discard them because they will not issue a replacement!!!
I can't help you on the CWD units never had to deal with that mess. Just the earn a buck.