Why does my converted GPX file import into MotionX-GPS as multiple tracks?

If a KMZ file is converted to a GPX using gpsvisualizer or another converter, there is a chance the track will be broken up into segments and when it is imported will show up on the MotionX-GPS Tracks page as multiple tracks.

To make sure your track is imported as one track you may manually delete the track segment separators from the GPX file.
Example of the separator: (remove the section in bold to create one continuous track)