Here is a link to a blog written by Amy Johnson Crow concerning things everyone should know before they take an autosomal DNA test.
Sometimes people get different haplogroup predictions from different companies. The reason for conflicting results depends on the test performed by the various companies.
One company may be providing a haplogroup prediction based on STR
Member Tests in Progress at FTDNA as of 03/03/2018
Due Date, Batch #, Kit #, Type of
It is thought that the rate of unannounced adoption or false paternity is about 1 – 3% per generation and compounds with each generation. When confirming your lineage, we recommend that you test yourself and your most distantly related male
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