GPS Recorder: invalid Date of Track

Are all your routes ones with a route number greater than 9?

If you open the Chrome developer console, do you see any errors shown when you're running the GPS recorder loader?

When you're connected with the Web IDE, please could you paste this into the left-hand side:

for (var n=0;n<36;n++) {
      var f = require("Storage").open(".gpsrc"+n.toString(36),"r");
      var l = f.readLine();
      if (l!==undefined)
        Bluetooth.println(n+","+l.trim());
    }

and paste up what gets printed? It might be one of the files has got some unexpected data in and that's thrown off the file loader.