This popular discussion was copied from the former Help Forum, answered by AnalyticsEdge (RS)
Last week I googled around to help me filtering some information such as traffic2money.com. Today I logged on to see if was applied but it appears that it didn't work. Any clue ?
Filters do not work retroactively - they take effect the day they are installed. Use a segment with the same filter expression to remove the visits from your historical report.