They mentioned in the episode that the pin prick machines were only implemented the year before, so there was nothing for Kennex's dad to notice 10 years before.

While I disliked the subplot, The Haunting of Bill Crouse" and the lovely build up of the lie about Jen's death is the most this show has ever made me laugh.

Season 3 was insanely addictive. I had to limit watching it because every time I'd end up heading to my kitchen afterwards to bake something.

She could have uncovered the body while she was in Minnesota selling the house (though why they let her go back is beyond me). That's really the only reasonable explanation beyond teleportation.