What's special about the Diocese of Waterford & Lismore please?
Nothing particularly special.
Many (most? all?) Irish diocese cross county boundaries.
Which means that records can show up in multiple counties when a diocesan approach is taken to the records, which is obviously the approach the Waterford folks took.
Actually this Waterford diocesan approach is easy to understand, as some very important parishes cross the county boundaries, so how is one to know which record belongs to which county? You can't.
