Bug - Extra Terrain lines in map file

[oddul]

I suspect that this is a non-issue when the map file is loaded on the server, but the XML file specifies more than one line for the same terrain square with the same terrain. This can be replicated with any terrain type. For items, it seems to work properly. See map file paste below. If you look closely, position 0 4 is covered by the second line (0 3...) and the 4th line (0 4...). There are several examples of this in this one map.
<map>
<header class="DenseMap" width="15" height="12">
<string name="editor-version" value="1.2.5 (standalone on Windows XP)"/>
<string name="name" value="terrainbug"/>
<arch name="oob-terrain" path="terrain/empty"/>
<arch name="terrain" path="terrain/dark_earth"/>
</header>

<arch loc="0 0 15 3" path="terrain/dirt"/>
<arch loc="0 3 3 9" path="terrain/dirt"/>
<arch loc="7 3 8 6" path="terrain/dirt"/>
<arch loc="0 4 4 1" path="terrain/dirt"/>
<arch loc="6 4 9 1" path="terrain/dirt"/>
<arch loc="0 5 5 1" path="terrain/dirt"/>
<arch loc="6 5 9 1" path="terrain/dirt"/>
<arch loc="0 6 15 1" path="terrain/dirt"/>
<arch loc="0 7 5 1" path="terrain/dirt"/>
<arch loc="6 7 9 1" path="terrain/dirt"/>
<arch loc="0 8 4 1" path="terrain/dirt"/>
<arch loc="0 9 4 1" path="terrain/dirt"/>
<arch loc="8 9 7 3" path="terrain/dirt"/>
<arch loc="0 10 15 1" path="terrain/dirt"/>
<arch loc="0 11 15 1" path="terrain/dirt"/>

</map>