A computer glitch miscalculated the scores at Dayton Public Schools’ Math-O-Lympics competition Saturday, leading some of the wrong teams to get trophies.

The daylong competition pits several small teams, usually of about four students, from different schools. There are several phases, including a paper-and pencil round, a quiz bowl, and a requirement for the teams to build a structure together, said schools spokeswoman Jill Moberley.

There were 21 teams in this year’s competition, held at Thurgood Marshall High School.

“This is an anomaly,” Moberley said about the problems, which were discovered by Monday.

Additional trophies will be awarded to the teams who earned them but were not recognized due to the computer error. Those who were wrongly given trophies will be allowed to keep them, Moberley said.

“We’re not going to penalize them,” she said.