Human chimerism - a false flag

In an interesting article about human chimerism in relation to a baby born whose DNA only matched 10% of his 'father's' they make a number of interesting claims about it:

• One minute the article states that "the geneticists are blown away by this", followed later by "chimera reports are rare", then blow those both away with "human chimerism is very common".  It's either common or it's rare, it can't be both.
• "Genetically the dad is his son's uncle" - wouldn't he have been his son's grandfather?  10% match is a number more closely associated with more distant relatives.  Did they bother to test any of the other males in the family?
• "Human chimerism isn't new though - it's been seen in shows like CSI and in real life cases".  Claiming it was the story on a TV show doesn't make it any more likely than seeing Jedi powers on Star Wars makes The Force any more real.

I'm all for the truth in genetic mutation and believe that it must exist, however I think this lack of real study is probably just going to fuel more and more cases of children's DNA not matching their father being blamed on "another case of chimerism" instead of what it is statistically more likely: pregnancy from infidelity.

Also, I was under the impression that chimerism was more likely to occur in women as their DNA is thought to be altered slightly with each baby they carry to term.  Of course, I don't see anyone reporting that information as widely as this potential get-out-of-infidelity chimerism stuff.