At least 44 of the government contracts canceled on the orders of Elon Musk’s cost-cutting initiative have been resurrected by federal agencies, wiping out more than $220 million of his group’s purported savings, according to a New York Times analysis of federal spending data. But Mr. Musk’s group continues to list 43 of those contracts as “terminations” on its website, which it calls the “Wall of Receipts.” The group even added some of them days or weeks after they had been resurrected. The result was another in a series of data errors on the website that made the group seem...