I've created a strip map for a linear feature and have it loaded as a data driven page. I want to show stationing for the line. The stationing displays properly on the first data driven page but on each subsequent page the stationing labels get messed up as the map orientation changes. I want the stationing labels perpendicular to the linear feature as shown in the first image. The tick marks seem to rotate and stay perpendicular to the line but the labels won't.
How can I fix this?