Good idea, never thought of that. It does show up as being in British Columbia in the FSX airport selection interface. I opened the AFCAD in ADE and it is also showing up as British Columbia. You are correct, it is a 3rd party airport, http://stuff4fs.com/newpage.asp?JS=True&Folder=CYYJ
Not sure what is wrong in this case. Would it be better to approach the airport author?