Scheduling glitches led an immigration judge to deny the Trump administration's request to order four Central American migrants deported because they failed to show for initial hearings Wednesday in the U.S. while being forced to wait in Mexico.

The judge's refusal was a setback for the administration's highly touted initiative to make asylum seekers wait in Mexico while their cases wind through U.S. immigration courts.

One migrant came to court with a notice to appear on Saturday, March 30 and said he later learned that he was supposed to show up Wednesday. He reported in the morning to U.S. authorities at the main crossing between San Diego and Tijuana.

"I almost didn't make it because I had two dates," he said.

Similar snafus marred the first hearings last week when migrants who were initially told to show up Tuesday had their dates bumped up several days.

Judge Scott Simpson told administration lawyers to file a brief by April 10 that explains how it can assure migrants are properly notified of appointments. The judge postponed initial appearances for the four no-shows to April 22, which raised more questions about how they would learn about the new date.