I have the same trouble: having the text from both pages overlap when I focus through the book. I can adjust the size of the "blip page" - or vary the amount my eyes diverge, but this takes a bit of concentration. If I just relax and look "a thousand yards" through the book, that is when my eyes are diverged the most and the text overlaps. My question is: IF the text overlaps while photoreading, can my mind still process the information so that I may recall the material later? Can my mind record the book if the text overlaps?
I know what you mean when the text seems 3d and sharp, coming off the page, that is when I have adjusted the phocal length of my divergent gaze. I do it all the time in martial arts practice. I want to learn how to read books the same way I "read" people in multiple attack practice.