Common-law status becomes conjugal partner status if the couple is separated by immigration but not legally separated in a relationship. And he is not just good, he should simply send an updated family information form through the web form. At a work permit stage, this is NOT a problem but should be corrected in order to not become a problem later. Also, as a common law partner of a skilled worker (if that is the case), your partner and the kids can come to Canada with you and she will get an open work permit. Best regards