So do you mean I should apply for my work permit and then apply for my spouse and child after I get approved? As opposed to apply for all 3 of us at the same time?
Oh - i thought you already have gotten work permit and were only asking about the rest of your family. My mistake, i simply skipped the thought that you would be applying for yours too. No that should be fine. It effectively means they won't even have track of any details of your family yet. You should just apply right away at the POE for all of you together.
What i had in mind was for countries which require work permits and visas to enter canada and cannot apply at POE, some times their children are born between the time they received permits and actually travel.