That corresponds with your tournament settings. What I see:
Champions Trophy
OAKMONT CC
4 Rounds Strokeplay for free All players welcom 7 days to play
01 Mar - 23 Mar Stroke Play Top Scores Unlimited Free
That means you gave the participants a certain time (7 days?) to play each round repeatedly. If someone re-enters before the starting date of the second round, he will be playing the 1st again.
I fear, though, that you may have erronously set up one or more rounds for less than 7 days, because with 4x7 days duration, it should only end at Mar 28th, not on Mar 23.
A hint for the next time: While unlimited play is o.k. for ordinary tournaments, a "Champions Trophy" might be better off with single play - my 2 Pfennig.