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Am I going to have to be put from the beginning again ? Or will I be in que?

You will be queued based on the date that you will reship the application (if it will be returned). Mine was missing a signature on Schedule A form and it was sent back to me. I sent it to them end of October when I originally sent it in September. So, I had to wait again, sadly.
 
I cannot believe I let someone else do this for me. Should I get an immigration lawyer to do these for me ?

Unless, you do not understand the procedure, I do not believe, you need to hire one, however, if you wish to be just secured, go ahead.
 
I am about to freak out I sent in the 2016 checklist instead of the 2018 checklist I am freaking out right now as I just realized that I am crying my eyes out I don’t know what to do anymore . Is this going to affect my application? Will they return it? I sent it in oct 2018. Someone gave me the wrong checklist that they used.

Why did you take a checklist from someone else instead of just getting it directly from the IRCC website?

The checklists are different, with different requirements for some things, so your app will almost certainly be returned.

At this point, as already advised, you should start preparing a new app as per the actual checklist. When the other app is returned, you can submit the new app. There is no need for a lawyer.
 
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