It appears that the passenger lists show a different time-line than what you have posted...
Ludwig arrived just a few weeks before Susanna...http://search.ancestry.com/cgi-bin/sse.dll?indiv=1&db=ny...
New York Passenger Lists, 1820-1957 about Ludwig Olesko
Name: Ludwig Olesko
Arrival Date: 30 Mar 1911
Birth Year: abt 1883
Birth Location: Venezuela
Birth Location Other: keaserslentern
Port of Departure: Bremen
Port of Arrival: New York, New York
Ship Name: Roon
Maybe a "ditto" error on the record keepers' part.... :l