And how many messiahs did your god send at them time? According to history it was a great many and all were contradictory. Perhaps Jesus just won out in the contemporaneous religon religion forum of the time from the many possibilities and therefore satisfied that prophecy post hoc (at least in your mind).
He sent only one, His only begotten Son. Jesus fulfilled the Law and the Prophets, doing all that the Father, the prophets, and He said that He would do. There were no others.