Of course her phone would be pinging if people were calling her...but if it pinged within a mile, that either means that someone else was calling her, who did not yet know she was missing, or there was not as much of a lapse before brother realized something was wrong.
What I mean is, if he put her into a car and fled, they should have been more than a mile away very quickly, so it really depends what time the pings occurred and who they were from. If the ping was within a mile and a full hour after the abduction, they must have still been in the woods?
All this new info does is bring up lots more questions
Especially since it is so vague.
My personal belief is Holly was targeted, based on a sexual/perverse motive, and she was taken away from immediate area. I do not feel she is alive, as I feel this was someone somewhat local and he has resumed his regular activities in community.