Let's stick to the facts.
Unlike applicants of other classes, spousal class applicants do not need a CIC request before conducting a medical exam. Thus, it is important to be clear with the physician that you are requesting a spousal class applicant's exam when making any appointment. Folks have reported having issues scheduling exams before submitting their applications but it always clears up once they clearly explain their application class to the person scheduling the exam for the physician's office. It is also important to ensure clarity so that the correct EDE form is used.
Note that there is no limitation to having multiple exams conducted. That's a fact per the DMP Handbook, not simply my opinion. The Panel Physician would just need to mention it to the RMO as part of the report if the other exam was recent:
Code:
"2. Simultaneous or Duplicate IMEs
Occasionally, applicants may be seeking examination at two locations at the same time. In addition, DMPs may encounter applicants presenting for a second IME while the initial examination is still in process. If a DMP becomes aware that an applicant has recently been examined at another location or is currently undergoing another Canadian IME, the DMP must notify the responsible regional medical office."
Source: http://www.cic.gc.ca/english/resources/publications/dmp-handbook/section-11.asp