Thanks for sharing the link. The link is the official document of the consequences for submitting multiple application and seems scary. Yeah I have submitted my second application because I was told to do so. I don't care if my application is delayed for this reason.
The only reason I was rushing because I thought Canadian passport is visa exempt to visit Russia for the Fifa world cup. Seems Canadian too required visa to visit Russia. So I am not rushing any more. I just regret sending the second application.
You don't need a visa to go to Russia for the world cup if you have a Fan ID, which you can obtain if you have tickets for a game.