Taking a quick look at this particular case, and you're right, it doesn't even seem to work by their own requirements (based on max allowable span). Even if simply supported such that the table applies, it seems to fail using their own loading, and doesn't meet their stated L/360 deflection...
When looking at part 9 in Canadian codes for the first time, it helps to understand that all of the prescriptive requirements of part 9 are simply canned part 4 solutions presented in tabulated form so that home (or small building) builders don't have to hire an engineer for every build if they...