I asked Claire at Irish Genealogy News and she thinks the misleading indexes relate to the years when the records were not collated into quarters ie the marriages we've been looking at are pre-1878 when they didn't have quarters. I suggested to Claire that Irish Genealogy ie should have either left out the quarter information for those indexes or perhaps entered them as 0 to avoid confusion.
Arrangements as follows as per Claire's Irish Genealogy Toolkit:-
-From 1845-1863, the marriage indexes (which include only non-Catholic marriages) are arranged alphabetically and are hand-written. After this date, the indexes are typed.
-From 1864 to 1877, the indexes are in alphabetical order in one book per year.
From 1878 to 1902, the indexes are arranged alphabetically by quarter (ie four quarters to one volume). Unless you are certain of the date of the event, you need to check all four quarters and bear in mind that a birth, marriage or death that occured in one quarter may not have been registered until the following quarter.
-From 1903, the birth indexes (but not the marriage or death indexes) are in alphabetical order in one book per year. The maiden name of the baby's mother is recorded, too, for the first time. This makes searching for a large family of children much easier.
-In 1922, following the division of the island into Northern Ireland and the Republic of Ireland, the GRO function was split between GRO Dublin and GRONI Belfast.
http://www.irish-genealogy-toolkit.com/ ... rrangement
Blue
Member No. 8038
NIL SATIS NISI OPTIMUM