I agree. I bought "season 5" of breaking bad last year knowing that there would be 8 more episodes, only to find that it's been split into "season 5" and "the final season".... Even though season 5 IS the final season. There was no disclaimer anywhere that I was only buying half a season (I checked thoroughly).
Business is business, unfortunately for the consumer
My daughter used to watch iCarly and in her collection I noticed that the first 3 seasons had 20+ episodes, then it got cut down until the last season was only 10 or 12 episodes. Of course the networks don't tell you this, but you pay the same for each season.