Staffers who had multiple titles are categorized by the latest one they held. Filtering by legislator will only yield payments made by that legislator or that legislator’s committees.
The average salaries only take into account employees who were paid for about a full year. Since not everyone uses the same title to describe the same job, the Mirror grouped the positions by the staffer’s primary role.
Source: Legistorm, Secretary of the Senate and the Clerk of the House. The Senate salaries are from October 1, 2012, to September 31, 2013. The House salaries are from January 1, 2013, to December 31, 2013.