TYPES OF ADS UNIT IN ADSENSE
There are three types of Ads Units after you publish them:
1: Active: Ads are active and being displayed somewhere.
2. New: Newly created Adsense code, would become Active, once Google team approves it.
3. Idle: The Ad units which are active but not being displayed anywhere.
Hope this resolves the issue. For any thing else, do comment or get in touch.