Actually, Trump just tweeted that they refused to sign the certification. This being Trump I don't know if it's true or not, but it is possible that they did not formally certify after all. In which case, kudos to them. Audit that thing first, then certify.
From which we conclude that they are gullible idiots. They certified it on the condition that there will be an audit. There's not going to be audit if county has certified already. This does not change my point. With 70% of precincts showing unexplained anomalies, there are serious questions about fairness of this election.
Here's why it was certified: https://www.youtube.com/watch?v=B6BFYOuCY_c. Race card, fire and brimstone, you're going to hell, he threw at them everything he had without disputing any of the facts. They folded like cheap suits.