this is a quote from Matthew on another forum but i think it might help you as well-im assuming you have an inland application in process because you said you had to reapply now
even if CBSA picks up on the fact that you're a 4-year overstay, the fact that you have an inland PR app in process means they give an administrative deferral of removal. See IP 8 section 5.3:
http://www.cic.gc.ca/English/resourc...s/ip/ip08e.pdf
Under the spousal policy, many clients can benefit from an administrative deferral of removal if
there is evidence that they have a pending spousal application by the time they are deemed
removal-ready by the CBSA.
So, despite what the public web page says about maintaining status, having an inland PR application filed actually does give you some degree of protection from removal, as long as the reason you would be removed is not serious - i.e. a simple overstay or breach of conditions of your stay.