On Ancestry, back when their DNA tests were different, somehow I got more Irish than both my parents combined. But I had only a trace of Great Britain but both my parents had more. But then they re-tabulated their DNA calculator things, and my Irish went way down, and my Great Britain Scotland and Wales went way up, and I didn't have anything more than both my parents combined anymore. I think what happened was, is there's a lot of admixture with nearby regions, so the results can just come up different depending on the company's algorithms they use to estimate, as sometimes it could be both, due to admixture. However, to this day, I'd still like to know what they re-tabulated my Melanesian to. It came up on both Ancestry and on FTDNA, and all Gematch calculators show it, but somehow Ancestry decided my Melanesian is now something European, because all my results are European now... quite odd considering Melanesia really doesn't have any admixture, not even with its closes regions, and of all the other regions in the world, the least that the Melanesians would possibly have in common with, would be Europeans. But yet my Melanesian is now gone... I just pretty much take that as, the DNA test people don't know what they're doing, so don't put too much stake in their results. They're not intended to be forensic, or pass muster other than to entertain customers and help them find their general roots, and other relatives and help with discovering matches to maybe triangulate finding unknown ancestors.