Alexander Piper - Discrepency in dates

Alexander Piper, infant (1860-?) married Sarah Jane Piper, Free Settler “Beejapore” 1853 (no dates) and they had a daughter Jessie Elizabeth Kebblewhite (1880-1959)

According to http://stuffanddollup.co.uk/williamsfamilytree.co.uk/public_html/tr...

Jessie Elizabeth PIPER was born 25/11/1880 Tumut and died 1/5/1959 and married George Eli KIBBLEWHITE (George Eli Kebblewhite) on 15/4/1900.

Jessie is the daughter of
* Alexander PIPER born 1830 Belfast died 8/4/1904 Gilmore, NSW
* Sarah Jane HIBBENS born 1843 Oakham, England died 30/8/1915 Rockwood

Her father Alexander is the son of
* William PIPER born 11/6/1809 Saintfield, Northern Ireland died 11/6/1877
* Margaret HARPER born 9/4/1800 Saintfield, Northern Ireland died 23/9/1883

Her mother Sarah is the daughter of
* James HIBBENS born 1814 North Luffenham, England died 26/12/1880 Mundongo, Tumut, NSW
* Charlotte BOSS born 1823 North Luffenham, England died 21/12/1862 Tumut, NSW

http://williamsfamilytree.co.uk/tree/getperson.php?personID=I40449&... has the same information as http://stuffanddollup.co.uk/williamsfamilytree.co.uk/public_html/tr...

http://www.blowering.com/marriage.html has the 1859 marriage of Alexander PIPER to Sarah Jane HIBBENS at Tumut, NSW

http://gw.geneanet.org/suelopes?lang=en&p=alexander&n=piper... shows
Jessie as being the daughter of Alexander PIPER born 1829 Belfast, died 8/4/1904 Tumut and Sarah Jane HIBBENS born 17/10/1843 Oakham, England died 1915 Auburn, NSW

I have disconnected Alexander Piper, Free Settler “Garrow” 1839 from Alexander Septimus Piper and Mary Ann Piper