I've always thought that all of those calls were her desperate attempt to get someone to babysit so she could have that "special" date with TL. One of those many calls was to Jessie G, too. When she realized that she was stuck with Caylee, I believe she snapped, raged on Caylee and killed her...
I believe that computer guy who says he saw them at the box store and that little Caylee was many feet behind the felon as she exited the automatic doors.
Those calls were to see who was home and to make sure that George was gone and Cindy was gone and still at work. She was going to kill Caylee and needed the garage to transfer her to the trunk after she sealed her mouth with tape. What is the matter with everyone.
Remember she got very sure of herself about going home after a while and that is when she later ran into George and they got into the gas can fight.
I mean we learned all of this at trial. This is the reason the world is in shock over the outcome because KC intentionally killed Caylee and drove around with her for some two to three days until the stench was too much.