GoBinder does create a 8.5x11 page (actually 7.5x10.25 to allow for printer margins). GoBinder only shows the the top part of the page. By default it makes the page as big as possible, but zooms no larger than 100% to avoid showing giant letters.
I believe the word for the algorithm is sophisticated, and no we will not dumb it down. However, you will be happy to know that in future versions we have enhanced the algorithm even more to let the user override with their preference.
My guess is that you eventually use the AI of GoBinder, but feel free to try the manual mode.