Two things being discussed... a. no fast forward on Start Over programs, and b. "lay down" of last two channels selected.
a. Understand. It just doesn't allow F F. Point was, that the info bar makes it LOOK LIKE YOU CAN.
b. It -is- different now. Sometime in the past quite a number of revs back you could do the following:
Say, at night, your last two tuned channels were 3 and 4, ending on 4. You turn off sitting on 4 and go to bed.
Get up next day. Turn all on at 0820. The programming for both channel 3 and 4 from 0800 to the present time were available (had been laid down on the disk) so long as you did not move the tuners away from 3 and 4. You could go to channel 3, and use the BACK control to back up to 0800 (beginning of the program currently on). Or you could also back up to 0800 on channel 4.
In other words, the programming on the last two tuned channels, beginning at the time you went to that channel or the beginning of the current program, whichever is later, was availabl--so long as you did not tune to a third or fourth channel. If you did, THAT channel began to be laid down on the disk.