The federal government is recommending the state of Colorado repay $9.7 million in grant funds it says were not properly managed in the creation of its Obamacare health insurance exchange. […] The government concludes the Colorado marketplace did not adequately document costs that it charged to the establishment grants ($4.4 million); charged grants for unallowable contract costs ($4.5 million); improperly transferred costs from one establishment grant to another ($312,000); and improperly awarded bonuses, overpayments, unallowable promotional giveaway items, excessive and unreasonable tips, vendor rebates that were not credited to the establishment grants, and unallowable social activities ($463,000). …