If your rank or stats have become altered or modified outside of normal game mechanics, the Call of Duty servers will attempt to restore them using the most recently stored backup. This means that your rank or stats might not be exactly where they were before the reset occurred.
If you're experiencing issues with Zombies Leaderboards, rankings, or stats, check out the Zombies Leaderboard FAQ.
Rank and stats issues can occur for a variety of reasons, including:
Here are some best practices to protect your rank and stats: