NEW YORK (CBSNewYork/AP) — The name of a man killed in the Sept. 11 attacks is misspelled on the newly-opened memorial at the World Trade Center site.

The family of Jeffrey Schreier said the R and the second E in his first name were switched on the memorial.

READ MORE: In Advance Of Omicron's Arrival, New York City Children Flock To Vaccine Pop-Up Sites, Report Few, If Any, Problems

His sister Janice Hart, of West Hempstead, says she couldn’t believe it when she saw the error Sunday. Hart, her family and friends were so upset by the mistake that they left the ceremony early after discovering the typo.

“It’s a nice memorial it just upset us a little bit that they messed up the name,” Schreier’s nephew, Adam Hart, said.

PHOTOS: NYC Commemorates 9/11 Anniversary

Schreier worked in the mailroom at the financial services firm Cantor Fitzgerald, a company that lost 658 people that day. His remains were never recovered.

READ MORE: Omicron Variant Was In Europe Before South Africa Sounded Alarm

Memorial spokesman Michael Frazier said the letters apparently were reversed when the name was entered into a database. He says memorial officials regret the error and are working on fixing it.

The memorial opened to the general public Monday.

The memorial features two serene reflecting pools –that sit in the footprints of the two towers — ringed with bronze panels featuring the names of nearly 3,000 souls lost in the terrorist attacks in New York, at the Pentagon and in Pennsylvania.

The six victims of the bombing at the World Trade Center in 1993 are also included in the memorial.

The waterfalls cascading down the four walls of each fountain are the largest such fountains in North America.

MORE NEWS: 4 Firefighters Injured In Ceiling Collapse Battling Upper East Side Restaurant Fire

(TM and Copyright 2011 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2011 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)