Yes the coin was instamined
yes it was a mistake
yes Evan has been open about it from day 1
When a coin's actual emission is vastly different than provided by its algorithm, it is evidence of malfeasance, incompetence, or both:
DUFF: "Oops, I accidentally 2+ million coins in the first 24 hours."
BTCT: "Are you going to burn those 'unintentionally' insta-mined coins, to preserve the social contract and save your reputation as an honest dev?"
DUFF: "No. Because Reasons and Stuff."
BTCT:

Cultists: "Shut up and take our money! We want moar GoldDonkeyNodes!"
Of course, DASH isn't really a crypto-coin in the sense that BTC and XMR are.
DASH is completely controlled by THE DARKCOIN FOUNDATION, INC rather than decentralized community consensus.
DASH is simply what TDFI does, nothing more and nothing less.
Its ad hoc technology is constantly changing by adopting (broken versions of) the latest fads, such as CoinJoin (AKA 'DARKSEND') and Green Addresses (AKA 'INSTANT-X').
DASH must answer serious questions about its centralized Reference Node and bus factor of one, whether or not we buy the fishy story of the 'WHOOPSY-MINE.'