New account - Double import of emails from gmail

New account - Double import of emails from gmail

Just got setup and everything seems to be working ok, spf not yet, but hopefully that will come right.
Unfortunately all my migration emails out of a free gmail account have doubled up.
I see that I had imap and pop enabled for import :(

I've turned pop off, is it feasible to delete everything and will it import again? (correctly this time?)

Thank you, Sean