This is primarily an internal database issue, but since it probably will drastically affect the show rankings, here are the details.
If you want to Help with testing stations, PLEASE sign up as a volunteer and use the testing pages. The issue being addressed is that people are using the normal pages to “Test” and “Help”, which is inflating the counts significantly. A few people may be “testing” every station on their favorite radio show to deliberately inflate the popularity of that show.
So now a “listen” will only count if you actually listen to the show on that station for a significant period of time.