Anne Marie: well found but does the info perhaps need a bit of unpicking? The first marriage record for St Michael's surely dates from 1829 so my guess would be that the 1827 event must have been registered at St Mary's Bornish? That would presumably be the bride's RC parish and I put it that way because a church wedding was very rare, the priest usually going to the relevant township.
A Garryfluich [or Garryfliuch as it was normally written down] wedding would not normally have been a matter for the priest at Bornish but for the more northerly incumbent. 1827 was, in any case though, before St Michael's existed as it was built after the 1828 arrival of Fr James MacGregor though the move to Ardkenneth may have taken place before that, coincidentally from Garryfluich, where the priest from c. 1803-1827, Roderick MacDonald, was a son of the tacksman and 2 x great grandson of Ranald Og II of Benbecula. The couple then evidently settled in the husband's township, Mr Seumas was in place at Ardkenneth, conducted the baptism amd made the entry at St Michael's.
Is that how it reads to you? Angus