Erick Perez said he received the violation earlier this year accusing him of speeding in front of Pinecrest Middle/High School on Bird Road. He says he never drove past that campus. When he appealed, the school named on the ticket was changed online to Pinecrest Preparatory Academy Elementary School — a campus he does pass.

A second discrepancy followed. The citation listed the alleged offense at 7:42 a.m., but the sign posted at the location showed enforcement did not begin until later. Perez appealed again, and the ticket was eventually dismissed.

His case surfaced after residents in Miami Springs raised similar concerns, reporting different speed limits posted within the same school zone. Drivers from Northwest Miami-Dade to the southwest have since contacted reporters with questions about whether signs and camera enforcement information are consistent.

The Miami-Dade Sheriff's Office said the mix-up stemmed from an effort to distinguish two similarly named schools about six blocks apart. In a statement, the agency said RedSpeed, the company operating the camera system, updated its records to separate the elementary campus from the secondary campus, but "the locations of the two schools were inadvertently transposed."

"As a result of this oversight, and in an abundance of caution, the Miami-Dade Sheriff's Office (MDSO), in coordination with RedSpeed, proactively elected to void all violations issued during the affected timeframe," the statement said. "Additionally, any payments made in connection with those violations will be fully refunded."

RedSpeed did not respond to questions about whether similar discrepancies exist at other locations across the county. A county spokesperson said a large number of RedSpeed sites are in various stages of permitting, construction and inspection — a response that left drivers asking what exactly is verified before tickets go out.

Attorneys who handle these cases say the cameras should stop issuing citations until the discrepancies are resolved, and that violations already issued should be dismissed with refunds to drivers.

Perez said he wants accountability. "If they're going to ticket people, they need to get it right," he said.

The episode raises broader questions about a program marketed as a child-safety measure. School zone cameras are intended to slow traffic near campuses, and few dispute the goal. But the volume of violations generated across Miami-Dade — and now the documented errors — have fueled doubts about oversight of the vendor-run system.

County officials have not said how many tickets fall within the affected timeframe or how the refunds will be processed. Drivers who believe they received erroneous citations are being urged to appeal and to document the signage at the location where they were ticketed.