That's a good catch. So, she claims she had her phone with her. That's either a slip-up or it's true. If true, then she likely did leave her phone somewhere after she drove away (I'm guessing). Otherwise, LE would have a much narrower view of where to search
HOWEVER, let's say she left her phone on most of the time. It would probably show her driving all over Colorado Springs, stopping many times, mostly at stores.
Of course, we haven't seen that selfie (why doesn't she release it since she's so interested in doing her own PR?)
It needs metadata for the police to believe her.
This case is unique (to me) in its amazing, constant use of social media by a person who is clearly a POI, even if not yet named by LE. LS herself keeps us thinking of her as a POI, through her constant inconsistencies and lies in SM.