The blood was not out of reach of the blood pool, the blood pool was hidden by the Bible and was under the top of the Bible. You keep looking at the photos of the bottom of the Bible where there was no blood pool and thus not blood on the bottom of the Bible and then drawing erroneous conclusions.
No I'm not, how do you know where I'm looking

? I'm looking at the top and I don't agree with you! Of course some of the blood was hidden by the bible but however far it ultimately reached, it would have extended
from Sheila, there would be no gaps. Your theory doesn't work because it doesn't explain why the stain doesn't start at the top corner of the page - there is a gap, then the stain starts (see below) or why one side of the stain isn't straight where the fold of the page would have been. The stain is also TOO well defined to be from the stain on the floor. Finally, for your theory to be correct, there would still be blood on the opposite page because some of that page couldn't fail to touch the blood. The second picture is a top view and the bible isn't raised as much from the bent back pages so more of it is touching the surface area.
Finally (Edit), if the pages are bent back, the corner of the page in question will be situated around where I have drawn the line on the last picture,
Ignore the first picture, was getting my fold in the wrong direction - the rest still stands!