The only thing I can think of is to delete your save and go through again. It won't remove your achievements, but it might reset your intel. Will suck, but you'll need to go through again to get the achievement, but rookie should be fine. Not a big deal really. I've gone through SP on Veteran already and usually play MP, but every now and then I'll just run through a few levels of SP on Veteran when friends come over and are in the mood to kill some terrorists and blow some stuff up.
I would do that.