In a raucous meeting, Ethiopian football’s governing body voted to sack Ashenafi Ejigu but rejected the resignation offer by vice president Berhanu Kebede, who had previously been blamed by the body for the mix-up.
Some members of the football association and journalists at the meeting called for the whole management to be sacked.
Sahilu Gebremariam, the federation's president, said he was likely to submit his own resignation in an upcoming election for seats in the body's executive committee.
"This was a massive blunder so we all should have resigned," he told Reuters. "But we have responsibilities ahead so we voted to stay until September."
Ethiopia's 2-1 win over South Africa in Addis Ababa on June 16 had given them an unassailable five-point lead in their group and place in the final phase of African qualifiers for the 2014 World Cup in Brazil.
But hours later, world governing body FIFA said it was investigating allegations Ethiopia had played suspended midfielder Minyahile Beyene against Botswana on June 8.
Minyahile had been booked twice in previous matches and World Cup rules state a player who receives two cautions in the qualifying campaign must serve an automatic one-match ban.
He was shown a yellow card in the 1-1 draw with South Africa a year ago and again in a 1-0 win over Botswana in March.
Ethiopia, who have never qualified for the World Cup finals, are expected to be docked three points meaning a place in the final qualifying round will be up for grabs in Group A.
If the points are redistributed, Ethiopia will have 10, South Africa will be on eight and Botswana on seven with each team having one match left to play in round two.
Officials said they mistakenly fielded the midfielder. Vice-president Berhanu, also team leader during the match against Botswana, said he had lost a letter from FIFA that notified the Ethiopian body of Minyahile's bookings.
"I never use pens and papers during matches, let alone keep records of cautions," said team coach Sewnet Bishaw. "I only focus on ways to win the match."
Ethiopia play the Central African Republic on Sept. 6, while South Africa lock horns with Botswana.
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