on the same day i got a e-mail with the following context:
Hello xxxx, the Dotlines are just there for referance, regarding the Graph not going higher i have just tested with my 3500 using 8x Blank Media which can be written with 12x and i get a simular Graph but i will check up with our R & D Team on it.
Thank you for your Question concerning our Software.
Alcohol Soft Support Team
so they are working on it...