Three days after the Maryland health exchange launched its online marketplace for the uninsured and underinsured, Lynn Baklor enthusiastically logged on. Three months later, she gave up in frustration. "You win," she wrote in mid-January to Lt. Gov. Anthony G. Brown, the governor's point man on the Affordable Care Act. "I raise my white flag and surrender." The Baltimore corporate consultant's application was one of roughly 11,000 stuck in the exchange website since its Oct. 1 launch, and a top exchange official said they all came from "early adopters" like her — yet another problem plaguing Maryland's exchange.