Hi
If you don't have your PR yet, change them now to accompanying. Otherwise, either she or you will have to start all over again - fees, medicals, etc - to sponsor them. If they're already on this ap, which has not been finalized, and you've changed your mind about bringing them to Canada now, just let Vegreville know you want to change their designation. They'll tell you what needs to happen.
It looks like his application has been approved, so it is probably too late to change from unaccompanied, but he should try, as He would have to sponsor them, as they are not his new spouses dependents.
PMM