I've had a reply from my Trust Pilot review
Reply from Ancestry.com
2 hours ago
Hi David and thank you very much for taking the time to share this review of our DNA service. We are eager to address this with you.
Even with a perfect knowledge of the history of your ancestors, DNA can still show some unexpected results. Remember AncestryDNA ethnicity estimates are based on available data. Ancestry uses established baseline ethnicities taken from living people with verified roots in a particular area. This is otherwise known as our reference panel. We calculate your ethnicity estimate by comparing your DNA to this reference panel made up of DNA samples from over 68,000 people, representing 84 different global regions and over 1,800 communities.
It is important to note that DNA does not respect borders and modern political boundaries do not always accurately represent relationships between different regions. Heavy migration over the last few hundred years and subsequent inter- marrying means that DNA for some regions can be particularly admixed, especially with closely related regions.
Remember our test does not test for nationality and so while your father and mother may be Irish, this is not to say that their ancestors actually originated from Ireland. If their ancestors before them had migrated to Ireland from somewhere else, they would have brought their DNA with them and this in turn would be passed down to you.
Genetic inheritance is completely random and so while we each inherit 50% of our fathers DNA and 50% of our mothers DNA, we do not get an equal split of their DNA. We've linked an article below which discusses inheritance.
support.ancestry.com
Remember that your DNA is only one element of a much larger picture, and your family history and relatives will play an important role in your genetic make-up, even if they are not specifically reflected in your ethnicity results. Check out the linked below for more information on the factors that can caused unexpected results. We hope this article helps better explain your results.
support.ancestry.com
We'd recommend reaching out to your DNA matches to try and figure out how you might be related. Check out the article we've linked below for more information.
support.ancestry.com
If you have received some unexpected matches, please see the guide below. We hope this might help you navigate any potential new discoveries.
support.ancestry.com