Why blocked ads may still appear in the Ad review center
When you block an ad by advertiser URL or by ad category, you may still see that ad awaiting review in the Ad review center. This is because in the Ad review center we show all ads that have received at least a small number of impressions in the last 30 days.
As such, an ad blocked by URL or category is not immediately removed from the Ad review center as it still has old impressions from the last 30 days. Instead, the ad moves down the list of ads for review (which are ranked by the number of impressions they’ve received) until it no longer receives enough impressions to meet the minimum threshold and drops off the list.