Okay, well if it's advanced, I suggest you remove the prompt altogether and make this an option that you can choose before you attempt to burn the DVD.
The way I see it is, the prompt is meant for an advanced user, who may already know what it's for and why he/she needs it. The way it is presented is slightly educational. As it stands, an uninformed person cannot fully deduce why he/she would "sway from the norm" based on the information provided.
By default, IMGBurn should simply perform the norm and burn the ISO to both layers. If an advanced user needs it to be on a single layer, he/she can go looking for the advanced option in the scary preferences or the ISO selection window. For more information, he/she could simply hover the cursor on top of that option and a mouse tooltip will further explain it.
Easy.
P.S. Thank you for taking the time to respond.