Zombie Mode affect k/d?

Is zombie mode supposed to add to your k/d?
I noticed that when i logged on the next day, I magically gained 3000 kills.
Now I see lots of ppl with like 4.0 k/dr (one guy had 10k kills, but his profile only showed 4k kills added up).

Will gm's rollback the kills? If not, I'm gonna go raise my k/d a bit before its gone