Trevor Clarke MLA (born 28 July 1967) is a Democratic Unionist Party politician in Northern Ireland. He was first elected in 2007 to the Northern Ireland Assembly as a Democratic Unionist Party (DUP) member for South Antrim. Clarke lost his seat at the 2017 Assembly election, but was later co-opted by the DUP after Paul Girvan was elected in the 2017 general election.
Trevor Clarke was a member of the Northern Ireland Assembly in 2009.
The article says he was a member from 2007 until 2017, and 2009 is between those dates. I think the system has a hard time understanding timeframes.