This is my last post on this thread as we appear to be going round in circles going over the same information. Added to that a lot of this information is covered in previous threads on this board.
My advice to you Peter is to appreciate the evidence that is there in the IOM records. In recent years IOM parish registers, including RC records, have become available free to view on Family Search it's better now than ever to collect the actual records.
Transcripts were excellent in the past and thanks to everyone who made these available. Times change though and now the sort of Family Search links I have shared with you are the best way to access IOM parish records.