Recordnow Max Question?

[OURKID]

Hi Peeps

Wondering if any of you peeps could help me with a rather minor problem that i have?
I have been writng my dvd discs with (don't laugh) nero and after seeing some of the posts on various sites have been advised it is 'at your own risk' so i have started using recordmax now 4.5

But now here's my 'problem' ...when i select the burn speed of 1x and insert my disc it starts up telling me the total burn time of say 64mins but then as it finishes initialising the disc the time suddenly drops down to say 28mins if i am using a 2x disc and even lower if using a 4x disc....does anyone know how i can prevent this as i want to burn at 1x to get a better copy(hopefully) I presume this program is analising the disc speed and writing to the optimum.
Thanx in advance