Hiya Ashley and a warm welcome to Rootschat 
not all trees are correct - so you will have to judge for yourself if they are 
.................................................
John Caswell 
Born 28 July 1707 - Bishops Cannings, Wiltshire, England
Deceased 4 January 1788 - Cherhill, Wiltshire, England, aged 80 years old
.............................................................
Elizabeth Flower
Born in 1709
Deceased 16 October 1787, aged 78 years old
.......................................................................
so
you have to decide whether the tree is right - you have Elizabeth Flower b 1719 - the tree has 1709 
you see my point ?
.................
the tree owner - she only has Ann Caswell b 1749 - no siblings - so I presume that is her line - BUT - you have Mary Caswell b 1761 - meaning Elizabeth Flower gave birth at 52 

so 
one of you is wrong 
this is what happens with Familytrees - you have to scrutinise them 
https://gw.geneanet.org/balizan2?lang=en&pz=raymond&nz=bromley&p=john&n=caswell a bit of info on Ann Caswell b 1749 you may not have 
https://gw.geneanet.org/balizan2?lang=en&pz=raymond&nz=bromley&p=ann&n=caswell 