from G&F
The license lottery consists of four separate drawings, one for each choice on the application. First, we hold a drawing for the first unit/first deer choice. When those are issued, we draw for the first unit/second deer choice, then the second unit/first deer choice, and finally the second unit/second deer choice.
My understanding of the drawing is depending on the unit and its #'s, but in general most of the tags for a unit are gone by end of 1st or 2nd drawing. So putting in for 2nd unit choice for the same unit of 1st unit choice is for the most part a wasted app. If the unit has 4 different species choices you can apply all your choices for that unit for desired species 1 thru 4 but by the second unit choice you may be drawing dead depending on how many people apply and how many tags available. Say you hunt unit 2B and there are only 2 species choices then by second unit choices the tags should be gone or you would have been drawn in the 1st unit choices if this makes sense. If you want to hunt only a certain unit then the best is to put in for same unit for all choices. All info above is not 100% guaranteed by I believe for the most part correct. May want to reach out G&F for clearer explanation.