They may be duplicates, but you can delete them. You can either go in the folder, or just highlight the folder, and press clear. The wishlist recordings should have a blue star, usually. If you want to remove the wishlist, you can go to the season pass manager, and highlight that wishlist and press clear.
Original S1 (Recycle Heaven)
Series 2 (PLS, sold)
TiVo HD (XL, PLS, "652")
Juliet Basic (4XL, PLS)
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!