positive rate is 8.2 percent on Ontario according to the link you sent ....
I see where your mix-up is. You are inferring that the "positivity rate" implies that this is the number of people currently infected in the province. It doesn't. It merely indicates the percentage of tests that came back positive. Most people that are getting tested, are doing so for a reason, i.e. they feel sick ... or maybe it's because they need to do the test for some other purpose such as to prove they're not sick before travelling. Either way, it's not representative of the population as a whole, and especially cannot be directly compared between jurisdictions who may have different testing volumes available, different criteria for sending someone to get a test, etc.