This is over a year old, but even though Goro said there was no way of knowing if you have even applied to other schools, it seems as though a decision was pending about whether to implement these guidelines.
http://forums.studentdoctor.net/threads/are-do-acceptances-known-by-other-do-schools.1114641/
Edit #2
I found this on the AACOMAS CIB
"Starting April 1, osteopathic medical colleges report to AACOMAS the names and identification
of candidates who have paid a deposit, hold a position at an osteopathic medical
college entering class or both. After May 15, AACOMAS reports to each institution the names
and candidates for its entering class who hold an acceptance(s) at additional institutions.
An osteopathic medical college may rescind an offer of admissions to a candidate
who has paid deposits to or holds positions at multiple institutions. If the osteopathic medical
college chooses to withdraw the candidate from the entering class, the college must give
the candidate a minimum 15-day notice. After the 15-day notice, if the candidate does not
respond and is withdrawn from a college, the deposit is forfeited and the seat may be given to
another candidate. Therefore, prior to May 15, applicants need to withdraw from any college(s)
which they do not plan to attend and only hold a position at one college of osteopathic medicine to avoid having positions withdrawn." (AACOMAS 2016 CIB pg 25)