"I heard from the recruiter and not from the council," said Chuang.
One of the five councillors who demanded Brown's resignation after the affair said he was surprised Chuang failed to retain her position.
"It's surprising that she hasn't been shortlisted, given she was good enough not that long ago to be engaged by the mayor as his interpreter at various functions," Dick Quax said.
"It seems strange. That world of experience and the strong support she had from the board and the mayor - it all seems to have evaporated."
Last October, Brown ruled out Chuang retaining her advisory role but changed his position in February, saying he would be directed by the selection panel.
Madison Recruitment refused to comment saying it was unable to discuss details of individual applications.
A council spokesman said Brown had no involvement in the recruitment process but would act on the advice given by the selection panel.
Chuang had been a member of the Ethnic Peoples Advisory Panel since 2011.
She was the team leader of the panel's youth subcommittee and responsible for its work progress report.
The former mistress remains on the Auckland Council payroll, working to develop the New Lynn night markets.