It's when people find the right census via a hint but mum will forever remain in her married name. That in turn throws up wrong hints.
I've spent most of the day fumbling through families that keep intermarrying, one of my main surnames and several of my big matches are all intertwined but the interlinked bits are all siblings from the pedigree lines, I'm pretty sure I'm related to everyone in 3 ways though.
Still frustrated with messages not being read. Why is it you can message a mystery DNA match and never hear from them but do a bit of stalking, erm, I mean research on FB and you can see what they had for breakfast, dinner and tea for the last three months!