Nothing impressive about that. What states are these in? Montana? Idaho? The Libertarian presidential candidates have never polled above 2% and they're on the ballot in all 50 states.
Libertarians tend to win state assembly seats in more conservative states. I don't believe they've ever won seats in the states you've mentioned.
Although the presidential candidate has never done well in elections other candidates have made excellent progress on the Congressional level. Carla Howell holds the record for the most votes in a Congressional race. She recieved over 300,000 votes in Mass in her bid for Senate against Ted Kennedy (roughly 12% of the vote). In some state assembly races Libertarian candidates recieved over 40% of the vote.
Weaning people off the two incumbent parties is difficult. Both Republicans and Democrats promise a smorgasbord of government programs and handouts. Libertarians do not. Libertarians have managed to place a measure on the ballot in Mass which would repeal the state income tax. There is massive opposition to the idea even from common folk. It's as though people like the feel of leg irons and they don't want them removed.