With the 104th legislature in NE there is a new senator with a hyphenated last name: Patty Pansing-Brooks.
Her representative data has firstname: "Patty Pansing", lastname: "Brooks".
If you view the bills she has introduced, her last name is listed as "Pansing Brooks": http://nebraskalegislature.gov/bills/search_by_introducer.php?Introducer=128
OpenStates does not have her as the introducer for any of her bills, probably because of the mismatch between "Brooks" and "Pansing Brooks". Either we need to fix how her name is parsed when storing the representative, or we need to update how be handle looking for introducers/sponsors.
This is a big problem for me at WeVote (wevoteproject.org) because now I will have to manually monitor and update bills until this is resolved.