No problem Redroger,
Confusion, plenty of it here, which is why I was worried that I was missing something that was obvious to everyone else!
The good news is, I have another potential cousin (shared family name and very close naming patterns, from same part of Ireland, but don't meet up in last few generations, as far as I can see) who has just taken advantage of latest sale to order Family Finder. It's a fairly long shot to get a match at what may be 5 or more generations ago, but at least she has 3 of us already tested, to look out for.
Sheila