Family Bible missing hand-written entry page; missing pages from 23&Me—family secrets or senility from illness?

My grandma passed away a couple months ago and we discovered she ripped the hand-written page from the family Bible with all the birth and baptism records. Hmm… weird choice Grams, but ok.

My Grandma's 23&Me report. It was also ***MISSING PAGES*** in the middle. Like, what the heck?!.

Is this common? My grandma kept an immaculate home, yard/flowers, shared shop with my grandpa. She did die of liver cancer though; and looking back all the things blown off as "just grandma" are now seem more like "cognitive decline from progressing disease process."

Also worth noting, in the garden shed was an old burn barrel garbage can/lid with ashes in the bottom. We discussed if it was for flowers [apparently no, wood is best for this and this ash wasn't from wood—it was from paper]. I thought perhaps these missing pages were of that ash. I was told that's absurd when she had a paper shredder. But if I had something I didn't want me nosey grandkids/kids in, I'd probably burn it too rather than risk it.

I was shocked when my mom showed us the Bible with the missing page. As a lost Canadian working on claiming that citizenship, I know people's entire cases can hinge on these hand-written records. I don't need the Bible entry info but dang, Grandma! What the heck?!?