It also sounds like somebody else was using Tylee's phone to message back people who were trying to contact her, and pretending to be Tylee.But also...zero friends have said they heard from her, got a pizza with her, went to the pool with her, etc. No contact at all, not just social media.
Even her older brother thinks that text messages he was supposedly getting back from Tylee after the move didn't actually sounded like Tylee.