You are using two filters on the same field. The only thing that this is doing is to get all of the posts in descending value by the one field. Ordering posts is something that is done on the DB query and not something that WP does after getting the post. Basically your sql query ends up looking something like:
... ORDER BY season DESC, season DESC
I can’t even begin to see a way to get what you want using this type of data.
