Rogue agent. Next time ask for a supervisor.
http://www.tsa.gov/what_we_do/layers...ight/faqs.shtm
If the name printed on my boarding pass is different than what appears on my government ID, will I be turned away at security and unable to fly?
Boarding passes may not always display the exact name you provided when booking your travel. The name you provide is used to perform watch list matching before a boarding pass is issued, so small differences should not impact your travel.