GPX "Save As" saves tracks multiple times

[OpenBrian]

I downloaded a large box from the DC metro area, including this trace ​http://www.openstreetmap.org/user/btornado/traces/555004 The name of that trace is dc.zip. The name of this trace is dc.zip. I only downloaded GPS traces, no OSM map data.

I clicked on the layer and clicked "Save As". Then i searched for dc.zip in this GPX file. It appears 49 times. In fact many of the traces appear multiple times.

$ grep '<name>' dc.gpx | sort | uniq -c | sort -rn | head -20

49 <name>dc.zip</name>
12 <name>gpslib.ru.gpx</name>

6 <name>blob</name>
6 <name>20120222.gpx</name>
4 <name>Wakefield.gpx</name>
4 <name>activity_322050329.gpx</name>
3 <name>CCT.gpx</name>
2 <name>DCPortland_ORJ_driving_Nuvi_2012.gpx</name>
2 <name>CCT_to_Laurel_Hill_and_Fountainhead.gpx</name>
2 <name>activity_84652645.gpx</name>
2 <name>activity_76715548.gpx</name>
2 <name>activity_64429746.gpx</name>
2 <name>activity_61710589.gpx</name>
2 <name>activity_370945442.gpx</name>
2 <name>activity_322954420.gpx</name>
2 <name>2_27_2010_6_07_42_PM_history.gpx</name>
2 <name>20120311.gpx</name>
2 <name>20090801.gpx</name>
1 <name>watkins.zip</name>
1 <name>track_20120913_154749_home_barnes_teeter_home.gpx</name>

I can attach a file if needed. It's 47MB.

[Don-vip]

That's because this user originally uploaded his tracks as separate GPX files, see ​http://www.openstreetmap.org/trace/555004/data

We cannot guess all these tracks are in fact segments of the same track. He should have sent a clean file.