I have finished recording two programs on my Panasonic DMR-EZ485V onto a DVD-RW and for some reason, with the manual in my hand to create chapters, I only need to make 2 chapters, following the instructions verbatim, Page 45, tells me to Perform steps 1−7b of “Accessing the Chapter View” So when I get through with 7b and press SUB MENU to display the menu list. then when I go onto step 8, there is no option to CREATE CHAPTER. Is this because it's a DVD-RW?