Seems they have expanded the number of dates you can choose in recent years. I think this would result in more permits being won by people who ultimately don't want them. The website wins because they get to collect multiple lottery / reservation fees for the same spot.
I am starting to wonder if the Lottery is even worth entering, or I should just wait until the unclaimed reservations open up. Last year was the first time I tried the unclaimed reservations, and I had better luck with that than the lottery, they went quick, but not instantly gone if I remember. I think there was like 5-10 minutes to grab permits before most were taken.