Ancestry.com has just "improved" their algorithm and wiped out my English ancestry.
Granted by my research it was only about 10% of the total but according to Ancestry it's gone. Now they say I'm a little over 50% Irish and a little less than 50% Scottish with a dash of Norwegian to round it out.
By my calculations doing it via genealogical research of historical records I figured I was roughly 65% Irish 25% Scottish and 10% English. Also Ancestry locates my Irish genes as having come from North Eastern and South Eastern Ireland when from the research I did about half of it at least comes from South Western Ireland.
And they still haven't picked up on my 1% Native American ancestry. So Ancestry still has a way to go to refine their data and analysis if my latest "improved" results from them are anything to go by.