Sloppy work on the part of the Mueller team, but I doubt that anyone will really care. This has always been about trying to turn Manafort into a “snitch” and to punish those who might try to stand up to the deep state.
The author of this article makes a good point. They suggest that if meddling in the Ukraine is a crime then what haven’t John McCain and Victoria Nuland been indicted yet. Read more here.