I have been thinking about the time line some more.
Let's go back and say that the 11:50 time is the correct time for the EZ mart.
That would mean that TS lied initially and has now changed her story to fit the evidence. Leading one to believe then that TS knew perfectly well what the "I got this" post was about. Surely, her BFF would share this information with her.
Surely, TS knows who had an issue with Shonda and is most likely afraid to say so or would it mean she will be going against her own blood?
Perhaps, "I got this" meant she was going to meet a boy? One she liked? Maybe he wanted a ride home? Maybe it was a positive thing, it did have those smiley faces, so was it a boy she like perhaps? She thinks she is going to meet a boy? Maybe pick him up from the party? It turns bad? Girls jump her? She leaves with a boy and gets run off Rd by angry girl?
How could VS (TS twin sister) and MS (TS older sister) be at the EZ mart with TS car if TS had just picked up her kids from VS, but then ends up goes looking for her car at the party and is then told MS is at EZ mart.