That is incorrect. The national acceptance report will list ALL acceptances and will be available all schools after April of the current admissions cycle. The AAMC has also changed the policy so up to the last 5 years will be available.
from AAMC 2014 Advisors Webinar Q&A
Can medical schools see applicants prior acceptances from previous cycles?
If the applicant is accepted to a school that they applied to in a previous cycle (and were accepted), then the school will be able to view this prior acceptance after the current application is processed. While all schools have access to previous acceptances through a PDF report the National Acceptance Report --that is released in April each year, it is up to the medical school to seek out this information. In other words, previous acceptances are not automatically pushed out to interested parties.