Lines that don't belong on printed map

Discussion created by ekpalmer on Feb 8, 2013
Latest reply on Feb 12, 2013 by HealdsburgCA
I am making a map that has a lot of layers and is really big (120"x60"). This map requires me to use a certain polygon layer twice (Canadian Boundaries). Everything looks fine on the .mxd and the .pdf files. However, when I print, it has long lines that stretch across large areas where they do not belong. Attached is a photo of an area of the printed map where this is occurring.
I have tried looking for a different set of data, and generalizing (100m) to get rid of excess vertices. Neither of which have helped, the new data did the same thing and the generalizing made large slivers.
Does anyone have any ideas or a work around?