Query on children of James Bradford LUCAS and Elizabeth MURRAY

There are a few issues with these children

multiple Sarah's alive at the same time

• Sarah 1829-1904
• Sarah 1830-1905

multiple Emma's alive at the same time

• Emma 1826-1904
• Emma 1842-1921

multiple William's

• William born 1830
• William born 1847

multiple Thomas

• Thomas 1834-1896
• 1836-1855

3 children born in 1830

• July Sarah and William
• Anne

2 children born 6 months apart in 1847

• George and William

Can anyone provide any sources for these children?

I have found the following birth records in Tasmania to James and Elizabeth

• James born 2 July 1820
• Elizabeth born 17 February 1821
• Olivia born 9 August 1823
• Mary Ann born 28 July 1825
• John born 28 January 1836
• Charles born 27 December 1837
• twins Martha and Caroline born 31 August 1840

https://www.familysearch.org/tree/person/vitals/LDLS-KXY has Sarah LUCAS
born 22 June 1829
baptised 11 July 1830
died 17 September 1914
married William ARCH

https://www.findagrave.com/memorial/186448642/sarah-arch
Sarah is buried at Maldon Cemetery beside her husband William

Victoria Death Record 10440/1914 - Sarah ARCH died 1914 Maldon, father Carpenter Jas LUCAS, mother Elizth SYDES
NOTE: Elizabeth's mother married SYDES when Elizabeth was 2

https://www.familysearch.org/tree/person/details/L7N7-GZ4 has Margaret LUCAS born 1834 died 1872 as having married and died in USA married to Walter Scott McKENZIE and Andrew J HANLEY

She appears in the 1870 US Census with a birth place of Scotland

The user who added these profiles to Geni hasn’t used Geni in 15 months so is unable to provide their sources.

I can’t find any records that match to them being the children of James and Elizabeth.

Until someone can provide evidence or sources for them I am going to detach them.