Too many random artists/songs

I have a couple of stations that are a mix of songs and artists for certain genres/time periods and thats fine. But when I want a station to play a specific artist for some reason that is very difficult. For example, one station I have thumbed up 16 songs by the artist I wanted and thumbed down 256. I used that artist as the seed for the station and it still only plays that artist 6% of the time. To add insult to injury after a point it wont let me skip the songs I dont like. Wish they would figure this out so I can pay to be ad-free and stream the music I actually want to listen to.

Snarfbug about Pandora: Music & Podcasts, v8.7