Congrats for your medical request. I also went to CMIPQ and they charged me 230$ (including tax) per person.
They are really fast sending report. I got medical "passed" within 6 days (6 days including Saturday and Sunday).
I didn't send medical result upfront. I am not sure why your are saying "basically your status of your medical exam was passed before you even received the medical request?"
They asked : 22 February (22-02-2017)
I did : 24 February (24-02-2017)
They updated ...
I got notification from CIC account via email.
If you link your application with CIC account, you will get notification for any update of your application.
You can check eCAS, you will find whether they received or not.
In my friend case, eCAS was showing "receive medical" after few days but CIC account was not updated.
Later, CIC updated his status "Passed".
I believe your status will change by this week. It took 13 days for my friend. He did his medical 10-02-2017 and cic updated passed 23-02-2017.
Have they received your medical result?