After a report issued in June found that the problems could potentially affect thousands of graves, defense officials received about 1,100 calls from worried families.
One of those callers, the widow of an Army staff sergeant, led to the exhumation of three graves late last month. The three remains in those graves, all former members of the armed forces, were found to be in the wrong place, said Gary Tallman, an Army spokesman.
"The families are satisfied that the problem was fixed," Tallman said Wednesday.
A fourth grave was opened Wednesday in a different section of Arlington. At the request of his father, the grave and casket of Marine Pfc. Heath Warner of Canton, Ohio, were opened. The site was found to hold the remains of Warner, who was killed in Iraq in 2006, Tallman said.
"We're gratified that the outcome was positive and they were able to gain some closure," Tallman said of Warner's family members.
Tallman said he was not aware of any other requests for exhumation.
The investigation into cemetery mismanagement marred the reputation of one of the nation's best-known burial grounds. Army Secretary John McHugh announced that the cemetery's two civilian leaders would be forced to step aside, and appointed a new chief to conduct a more thorough investigation to sort out the mix-ups.
Each year almost 4 million people visit Arlington, where more than 300,000 remains are buried, including those of troops from conflicts dating back to the Civil War, as well as U.S. presidents and their spouses and other U.S. officials.