Oh my, there are still people who use my beloved FCP7. I went to FCPX immediately when it was published, and after one year, I never used FCP7 again. It was my favorite editing software, but it is FCPX now. For your question, as far as I remember, there is an image scaling section in project settings where you set it as fit, normal, untouched, or something like that. You may want to check there and try copying again.
I hope it works.