Why This Shliach Put Tefillin On the Same Person Twice in One Day

how is it that I can put the filling on the same person on the same day twice how do you do it tell us on the plane to America we put the F on on the start of the trip and then when we landed in Los Angeles it was the next day which was Tuesday Morning the same morning as when we left Australia we put FL on Gordon is this true yes there we have we have