Quote 7
"Granddad did nothing but fuel them […] Granddad was drunk on his own power and my mother wanted me to make a play for the money." (59.25)
All the aunts ask their eldest children to curry Harris's favor. They don't seem to be putting the littles up to it, though, just the Liars.
Quote 8
"Bonnie's obsessed with dead things. She's reading books about them all the time and then she can't sleep. It's annoying when you share a room." (24.26)
Here's another minor plot point that becomes extra-creepy when you know what happened: Bonnie's obsession with death is a way of dealing with the loss of her sister, Mirren.
Quote 9
"You could die. You could get hurt. If you are terrified, there's probably a good reason. You should trust your impulses." (28.47)
Trusting their impulses is what led to the Liars' deaths, so it's odd that Mirren('s ghost) would say this.