Where does the article insinuate they cheated?

Near as I can see, it actively dismisses some specific exploits as not being a possible/likely cause.

I agree with this.

"In most of the team's peculiar wins, Cäke was 1v2ing and got 1 killing blow. Cäke's rogue partner, Kwamo was nowhere to be found in most of these games. If he entered the arena but disconnected previous to combat initiating, the Armory would show the rogue on game history with 0 damage done, 0 damage received, etc. -- but none of that appears. Virtually all of the teams are different, so it is extremely unlikely that win trading is going on, but something obviously isn't right."

Did you read that paragraph?

i don't think they did, Mr Rossi.

While the blog discussed that it probably isn't win trading going on, it still creates a negative buzz for two players over a database glitch.

If the point is database issues, then the focus should be on the database with this team's ratings as evidence. Instead, it approaches from the other direction discussing red flags and strangeness with this team and their ratings, and offering that it might be a glitch at the end.