I just changed my 2006. I always drain the back plug last and only a small amount comes out of it. Drops like you say. Doesn't even seam necessary to drain that plug.
The plug at the front on a normal rocket lol drains the oil tank so it always let's more out apparently . can't remember where I read that may have been the toilet wall so don't quote me on it
You have the same set up as me, Lupe. The very early '05's had the drain plugs on the ends. the middle plug on the bottom is the main drain for the oil tank.
If the bike has been sitting for a while you might get more oil from the other two plugs but if the bike was running recently ( to warm up the oil) then there should be minimal drainage from the other two.