Isn't it fair to say that investigations, particularly of complicated international financial transactions, aren't resolved overnight?
If the investigations are indeed as complicated as you are making them out to be, then how is it that you feel so comfortable walking away from that article with a definitive notion of foul-play at hand?
There's literally nothing in the four paragraphs you posted which leads someone in that direction (especially given Manafort's public consulting history) unless you are specifically itching to make connections. Which has been the case in practically everything Manafort related. The man was a high-level political consultant in Eastern Europe FFS -- of course there's going to be ties.
There could very well be a Russian connection with Manafort that links to collusion and the Trump administration, but that doesn't mean that we have to treat every dribble of Sbiten as damnable proof until the time comes when that piece is unearthed.