Hello Rick,

Unless Frances has transcribed these records (and she usually concentrates on 1700s ones) you can only resolve this by looking at the parish register. Both entries in the IGI are from church members, which have replaced the original extracted entries.
See Church of England. Parish Church of Kirk-Marown (Isle of Man): Baptisms 1622-1849 Marriages 1799-1849 Burials 1711-1849 FHL BRITISH Film 106733, or in the MM.

Sue