(a) it wasn't this board but Mary who found it
(b) Sarah was buried as a child (ie probably about 2 or older) before Patrick's marriage to Eliz Lewthwaite - are you sure it was her dau and not by a previous marriage
(c)there is a 4 year gap between Alexander of 1793 + Samuel (bur as a child) of 1797 - he could have been off Island - all other bapts were in Malew until they moved to Douglas c 1799 but there is no obvious contender in that reg as per igi.