["Port-au-Prince", 18.551426,-72.336845],
["Seoul", 37.586269,126.982498],
["Yaounde", 3.881587,11.516304]
And the map displays duplicated continents. Which is not a correct result.
The second test http://www.wangba.fr/test2.html the markers are the same but listed in a different order:
["Port-au-Prince", 18.551426,-72.336845],
["Yaounde", 3.881587,11.516304],
["Seoul", 37.586269,126.982498]
And here the result is correct (no duplicated continents). This is working as intended. The smallest bounds containing Port-au-Prince and Seoul crosses the dateline, which is the difference you see.
Ben