All the other siblings were Baptised at Moor Lane Baptist, Bolton le Moors, Lancashire. Jonathan's record isn't indexed with FamilySearch.org.uk so perhaps Jonathan isn't part of this family.
I suspect the following FamilySearch.org record may be a typo, and is actually 21 Jan 1807. This would then match with all other records, including ALL his siblings baptism records at the same place. The death index also suggests he was born in 1807.
Birth: 21 JAN 1827 Moor Lane Baptist-Formerly Scotch Presbyterian, Bolton Le Moors, Lancashire, England. (Should be 1807).
Name: Jonathan Buckley
Birth Date: 21 Jan 1827
Birth Place: Bolton, Lancashire, England
Event Type: Birth
Father: John Buckley
Mother: Mary Buckley
Denomination: Baptist
Piece Title: Piece 1022: Bolton, Moor Lane (Baptist formerly Scotch Presbyterian), 1793-1836
WARNING: There is another Jonathan Buckley of Old Bank, Slategetter baptised 2 May 1807 at Oldham, son of James and Betty.