Re: Something's wrong here
I bet dollars to donuts that the 27 years is just the DoJ summing up the maximum sentence for each charge and calling it a day. It makes for better theater and satisfies the Law and Order types (TV or otherwise) need for a pound of flesh and an eye for an eye.
In reality, it never works that way. Besides the sentencing guidelines that are always much less (takes things like prior criminal history into account), it's not uncommon for individual sentences for each guilty or plead charge to be served concurrently. And then there is the reality of no matter the actual jail sentence, the actual time served is less before release (assuming they don't screw up more).
IANAL, but after the Manafort stuff, Lawyer Twitter, and some other cases lately, this has come up enough that I feel internet confident about saying it. YMMV, and I definitely don't suggest you go citing this in your next legal brief or law blog.