I think Debbi had a car. Jeremy used his work truck and IIRC there was a car at home. Not that it matters much in your overview, but just to clarify.
Also, I don't know if 5 hours is the amount of time the parents (or anyone else for that matter) would have to disappear Lisa. 6:40 pm is the last time we have any record of anyone seeing Lisa, and that's from Debbi. If Debbi and Jeremy are involved, something could have happened to Lisa from the time they left the birthday party on Sunday all the way up through Tuesday morning. So far, we have no statements from the parents indicating that anybody else saw the baby on Monday. If Debbi and Jeremy are not involved, someone could have snuck in the back while Debbi and her friend were drinking out on the stoop up until Jeremy got home - anytime between 6:40 pm and 3:45 a.m. - no one is reported to have checked Lisa at all after 6:40 pm. That's potentially 9 hours lead time for an abductor.
I presume whomever took Lisa took the cell phones and we don't know if Debbi saw the cell phones any time after 6:40 pm either. We only know she claims to have been drunk and that her neighbor told her she turned off the lights after the neighbor left. Imo, we can't assume whoever turned on the lights is the same person who took Lisa though. There were walking children in the house and Debbi doesn't remember what she did - the lights could have been turned on innocently by Debbi or either of the two boys without them remembering. JMO...
I wish we had more time line details. Whether Lisa was abducted from the home or removed by someone in her family, it would be much easier to put some of the pieces together. I hope LE has filled in some of the gaps and is close to finding Lisa.