I am using the Map Series tool in ArcGIS Pro to create about 30 maps using "Florida BMAPs" as the index layer. Some of the features in this layer overlap. I assumed this wouldn't be an issue, because the Map Series tool would only display the selected index layer feature per map layout. However, what is actually happening is anywhere that adjacent BMAP boundaries coincide with the current selected BMAP feature, they are also being displayed. It is hard to ignore this error, since the line width for the unwanted features is even bolder than the correct boundary.
Is there any way I can fix this so that only the desired BMAP boundary is being selected & displayed?
In the image below, you can see the desired BMAP boundary is a thin black line in a oval shape surrounding the other polygons. I've circled the undesired lines (resulting from other overlapping BMAP boundaries) in RED.