We don't have any moderated threads, and redirects have rarely ever been used. I find it hard to believe that I would have only 200 000 posts and 1.3 million deleted posts. I don't feel reassured that something has gone wrong.
I'll have a good look manually. But the second thing you said confused me. You said it reflects the threads imported. Shouldn't it reflect posts imported?
And if it is threads, then why would it be saying it imported more threads then I have? (Almost 2000 more)