What are the differences with CM the Status codes C or R and how are they created?

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Somehow we have many of our reconciled transactions showing up as a C rather than an R. I'm not sure why or how, but I'm curious how the system treats a C vs an R. In terms of reports, cleared balances, ect, how are they handled differently? 

My understanding is the C status is for importing cleared checks (which we've never used). I wonder if we should look at it. I'm not sure if it could help us or not.

So that said, I'm not sure how we have C status items in our register. I'm guessing somebody had to manually assign them a "C" in an edit register session? Most of the transactions we've analyzed are on our bank statements and should have been an R from when the account was reconciled. 

I think a C only created by importing or edit register. And is R only created by reconciling or edit register. Is that correct?

Thanks!