State and county lines

When I use the state boundaries along with the county boundaries, they do not match up. Has anyone else experienced this? If so, what is the solution?

Thank you,
Andy Holland

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Andy Holland
Center for Environmental Modeling for Policy Development
Institute for the Environment
University of North Carolina at Chapel Hill
voice:  919-966-2172
fax:    919-843-3113
email:  andy_holland@xxxxxxx
html:   http://www.ie.unc.edu/cempd