CRM and Projects users are showing up separately in Books

CRM and Projects users are showing up separately in Books

I have imported my clients utilizing the import from CRM feature. Whenever I bill out for a project that is attached to that specific client, it automatically creates a duplicate contact in books, and I have to change the client that the invoice attaches to as well as delete the duplicate entry.

These are all the same client. I would like Books, CRM and Projects to work together, and not duplicate entries over each other.