I'm not sure the disclosure (of a related DNA sequence) was careless. In fact, having millions of correlated DNA sequences might prove quite profitable someday.
Although I'm a bit surprised that to remove DNA info, you need to close your entire account, at which point they will "remove all Genetic Information within your account (or profile) within thirty (30) days of our receipt of your request".
Or maybe not:
"Our contracted genotyping laboratory may also retain your Genetic Information as required by local law and we may retain backup copies for a limited period of time pursuant to our data protection policies."
Although I'm a bit surprised that to remove DNA info, you need to close your entire account, at which point they will "remove all Genetic Information within your account (or profile) within thirty (30) days of our receipt of your request".
Or maybe not: "Our contracted genotyping laboratory may also retain your Genetic Information as required by local law and we may retain backup copies for a limited period of time pursuant to our data protection policies."