Peter,
In this particular case - both in the marriage record(s) and in the birth/baptism(s) record(s) - there is one entry that has been
extracted from church registers and one entry which has been
submitted by a member of the LDS.
Go with the
extracted records
Submitted records can be very helpful but one does need to treat them with considerable caution - especially when (as in the case of the submitted birth record for John GORDON) they do not have a precise date and they have the place preceded by "Of". At their best, submitted entries can be absolutely correct - but at their worst, they can be nothing other than pure guesswork.
I note that the submitted entries include further details which
might be useful pointers. They have the parents of Margaret (VERNON) GORDON as James VERNON & Margaret DICKSON, and her death year as 1873. They have John GORDON's death year as 1865.
Incidentally, I have (only twice) seen two
extracted records for baptism of the same child. The only reason I could think of was that the happy parents had the child baptized soon after birth but a little while later they visited a set of grandparents who wanted to celebrate a christening - so the child was 'done' again in their local church ...
Regards,
JAP
PS: The marriage (1829) and the birth (1838) were both long before Statutory Registration commenced in Scotland (1855). So the records are not 'registrations'.
The marriage record is the entry in the church register referring to proclamation of Banns (usually, but not always, on two or three consecutive Sundays); the entry might also mention the date of the actual marriage - which, at that time, usually took place in a private home. The birth date sometimes, but not always, is recorded in the entry in the church register of the baptism of the child.
PPS: I notice that all the children of Wallace & Margaret have an extracted birth/baptism entry (all Penninghame) and a submitted birth/baptism entry (all Newton Stewart, or Of Newton Stewart) - extracted entries are Mary bap 1829, Margaret bap 1832, Jessie bap 1835, James bap 1837, John bap 1838, Isabella bap 1841, Wallace born 1843, Robert born 1845 and Samuel bap 1849.