The most recent information (I am talking presented by the new Dean of Admissions of uOttawa last week) confirms 90 interviews for 48 spots for the french stream. 48 spots are subtracted from the 164 total. Some can be included for indigenous applicants as well as MD PHDs in either stream. However, 8 of the 48 are CNFS reserved seats.
Very good observation! I do tend to focus on the french stream more so I apologize. I do not know for sure if the 575 interviews include interviews for french stream applicants, and have never looked into this myself. 485 interviews for 116 spots seems perhaps more reasonable, however I cannot confirmed nor deny either possibility at this time. If someone can confirm that would be great!
For sake of more information, out of the roughly 4000 applicants, only about 1800 were above the cutoffs established to be eligible for application