Don't worry. When you apply online, your file is sent to your closest CFRC. You need to print off and bring in a hard copy when you visit the CFRC. While you are at it you can bring in your original Birth Certificate, Proof of Citizenship, SIN card, Photo ID, and Transcripts if you have them; so that they can copy them. While you are in there with your Hard Copy, you can clear up any problems you have with Trade choices. The difficulty comes when someone selects an Officer Trade and a NCM Trade. Make sure you prioritize which Trade you want first. You have three choices, but do not have to use all three, if you only want one or two.