Hi BM21, I will go out on a limb here at least partially. The profile in your eg. will not assume you at at the CF going the right way. Lets say CF06 157/2000, that as you know is your next descent restriction and thats what you path/profile will be based on. If you are flying away from it on a downwind leg the ROD required to meet this restriction will reduce.
Next bit, I believe the path is calculated on a direct line from your FMC computed present position, however I will do some more work on this and get back to you.
Best rgds