Export plot showing merged features

[ChenghaoDUAN]

I am creating a hurricane wind path and merging the features of wind swath in data. In ArcGIS layout it looks like following:

However if I export the layout, it looks like following:

Which shows the undesired contours within the wind swath. I wonder why the export looks different from the layout.

Thank you

[AubriKinghorn]

Hi! Can you share your export settings? They export should match the layout, but it may be that one of the settings is affecting that.