Think off International Date Line, you phone crossed that boundary and it shows like this on UPS site.
But it didn't went back and forth, UPS is a well oiled machine, they cannot afford to send packages back and forth, not only this makes nonsense but its highly impractical to do so, and very expensive also!
It's possible. I've had items go back and forth before via UPS, but it's very rare. People make mistakes.