Yes, you are misunderstanding the numbers I posted, so maybe I could be clearer. I stated "In past 6 years, 10% of students left. 12% transferred in to US schools. Of the remainder, 2/3rds were dismissed or withdrew within 2 terms." So about 10% of the starting class will "leave" before third year- Of those 10%, some transfer into US schools, 2/3rd of the 10% are dismissed or withdraw on their own. We do not lose 2/3rds of our students- that would not be a school anyone would want to go to! In addition, some students decide to "decelerate" by taking fewer classes in a term and doing it over 2 terms instead of 1 if they are having difficulty, say in Pathology. That would also move a student from one class to the class behind.
As to the "eligible" point- SGUSOM is an international university training physicians, veterinarians, Public Health and other professionals for careers throughout the world. In the medical school, a significant number of students do not plan on training in the US, so they do not take the USMLE exams as they are not needed in their home country and It would be unfair to count them in the denominator for those that attain a US residency as they didn't even apply, yet they are a graduate. Therefore they are "ineligible" for US residency. Others may graduate and want a US residency, but either took a USMLE exam late so could not be in the NRMP (the match) or they failed the CS or CK exam and so are ineligible for the match. For those who are US med students, keep in mind that foreign med students are at a distinct disadvantage in that they have to have passed the CK and CS BEFORE the ROL certification deadline (late February). US medical school students do not- they can take the Step 2 exams AFTER the match, though many will take it before to improve their chances of getting their residency.
Feel free to go to the SGU website where the residency programs for the last 5 years of graduates are listed. Many competitive programs are listed.
Hope this clarifies it!