I am with two agencies in Ottawa, this is what they have both told me:
I can have 5 daycare kids plus my own two kids.
I can only have 2 under the age of 2 years,
1 child can be 2 years old, (3 under 3 years)
the rest can be 3 years and older as long as 5 of the kids are under 6 years old.
if I wanted I could have all 3 year olds or 3 two year olds (3 under 3years) and 2 three year olds. etc.

My kids are 10 months and 3 years, so I can have:
my 10 month old + 1 other under 2 years
one 2 year old
my 3 year old + 1 other between 3 and 5 years old.
I can also have 2 before and after school kids over the between the ages of 6 years and 10 years.
Since my two kids are under the age of 6 they count in my age numbers.

If you need me to explain it better, P.M. me and I will give you my phone number.