I am thinking somewhere in this application they have Brazil listed as a home address rather than a Canadian one. I say Brazil because this is apparently where they were married and where her hubby hails from. I think they probably added information into the application which would put it to an OUTLAND application. The only way anyone here could answer for sure why Vegreville sent it back would be if we could see all the details included, which I don't think they want to share.
My advice, would be to fill up a new application, ensure that it does not have a Brazillian address or chosen VO and then send it to the new address for processing in Missisauga.