@Saraluvdogs I took a look at your account, and see that you have 3 stations named Take Me To Church Radio:
It looks like one of them was collected back in 2015, so I'm assuming that is the station you are referring to.
I would recommend deleting the other two stations to avoid any future confusion with this.
This being said, that station does not have hundreds of thumb ratings as you mentioned.
When did those thumb ratings disappear?
Were you listening to the station one day, and then they randomly disappeared during the same listening session?
Or did they disappear after signing back into Pandora after not listening for an extended period of time?
Let me know.