My mom's data is from 23andMe. As I said, there she showed up as 100% European, with no other segments. Dr McDonald's results agreed. The only non-European data shows up in her X Chromosome, which he thought was "iffy." Here's her chart:
Ok, so Dr McDonald has confirmed the interpretation of 23andMe's findings for my mom and myself.
Next up: my dad's data. I tested my father at Family Tree DNA, where he shows up as 100% European. But both my parent's can't have 100% European DNA if I have "strong and likely real" segments of African and Asian DNA. It turns out that my dad does have those segments. I don't know why Dr McDonald found these segments and ftDNA didn't, but they are there. In the same locations as mine, plus some. He has .8% African DNA and .4% Native American (compared to my .6% and .3%). Here's his chart:
So this analysis confirms the rumors of Native American heritage in my Dad's side of the family. But there was no expectation of African DNA. Apparently though, this isn't uncommon. A lot of people with Colonial American heritage apparently have African segments in their DNA (read about them here on 23andMe's message board or this blog post).
I wonder if this comes from the same family line or different ones? I wonder if I'll be able to find it? I highly suspect my Barfield family could be the source and I hold little hope of ever tracing that line any further back than where it's stuck in 1852. Perhaps by testing more of my paternal relatives, I can narrow down the source.