Ummm, you're overanalyzing this way too much. From 2008, almost 78% of people who were interviewed eventually got in. Those are pretty favorable odds and it doesn't really do your sanity any good to speculate how many of those that weren't accepted turned into rejections and how many were due to withdrawing 😉.
Also, they just posted the numbers from the entering class of 2009. The stats are pretty much identical 10.05 MCAT/3.64 GPA, but there were 450 fewer applications and 253 more interviews offered.
Finally, the way you presented it, being one of 38 or 16 people to be rejected post-interview is not correct...If 522 were interviewed and 406 were accepted, that means that of the 522 interviewed, 77.78% or 406 of them were eventually accepted, and 22.22% or 116 of the 522 interviewed were NOT accepted...if it happened as you suggested that 10% of these folks who interviewed that weren't accepted was because of withdrawing their applications is accurate, that would mean that 12 people (rounded from 11.6) withdrew before acceptance, therefore 104 people would have been rejected post-interview if they were IS.