I recently came across the same thing and found that some of the OAA whitetail stage 3 dates were the same but with 12/12 available, presumably they are the same stage 3 assessment thus taking the total to 18. I would rather do a stage 3 with everyone being totally new to it but that's just my preference. The example you mention may be different also, however this is what I discovered a few weeks ago when looking at dates myself