Roger,
I've removed Thomas from this family as they do appear to be Linton, not Sinton (originals not checked) and their Thomas was born Mar 1788 Rothesay, Bute.
Your Thomas was born Sunup, Lauder 1785.
For some reason I can't edit John LINTON's profile to shift him back to Rothesay, nor to add the correct Thomas.
https://familysearch.org/ark:/61903/1:1:XYZV-Q31