The VectorPlacement XML saved from DevMode makes a redundant entry for displayName:
<VectorPlacement displayName="ElephantLine" displayName="ElephantLine" parentGroupID="1" groupIndex="1" profile="{2AFA52E3-EB66-411E-93A1-E7781E495CF2}" spacing="11.740000" heading="0.000000" scale="1.000000" scaleDelta="1.574400" rotation="Random" avoidDiscontinuity="FALSE">
<Vertex lat="42.63074342774348" lon="-88.60067647441822"/>
<Vertex lat="42.63269675888878" lon="-88.60053083614795"/>
</VectorPlacement>