The bottom line here...
Someone didnt pocket dial someone on this phone, and yuo know these phones had to still be pinging up until 2:30am so given the fact that LE must have looked at the ping history on these phones, it's safe to say Baby Lisa wasnt kidnapped or (something else) until up around that time.
If these phones continued to ping after this call, LE would have other areas it would be searching for these cell phones.
It could also be that the phone records just came back. I've seen a couple of times watching cases on "The First 48" where it can take around a month for the cell phone records to come back. I'm not sure about the ping data. I know they can look at a ping when it's in progress so maybe when they went to ping the phones when they first attempted to which was probably Oct 4, they werent responding. It makes me wonder if that's why they searched the pond they searched yesterday, or if they searched it simply because 1: it was across the street where they purchased the wine or 2: its between their current residence and the location they are staying at now.
So many unknown facts to speculate all over the place