It is so bad, and has been for so long (hasn't it been a full year now since the website was redesigned?) that TiVo has to know about it, and clearly doesn't care enough to do anything about it.
I recently found kmttg. It's far superior to the TiVo website, in terms of viewing the To Do List, viewing the Now Playing List, searching for programming, scheduling recordings, and managing the Season Pass List. Combined with a secure RDP connection to a desktop computer at home, it's a fantastic remote management tool for TiVo.