Data appearing after tracking code removed
Cached pages in users' browsers may send data after the tracking code has been removed.
Because browsers often use cached (locally stored) versions of web pages to speed up your browsing, it's possible visitors are viewing an older version of your page, with the tracking code still installed. Depending on their browser settings and how frequently they return to your site, these users may continue to generate pageviews for some time. However, this number will decrease as their caches are updated or cleared out.