WASHINGTON — Though it's little comfort to Central Florida veterans, top Veterans Affairs officials told Congress on Tuesday that they've learned from their mistakes in trying to build a new VA hospital at Lake Nona, which is now years behind schedule and hundreds of millions of dollars over budget. But lawmakers on the U.S. House Veterans' Affairs Committee were unconvinced and questioned whether the agency had taken the proper steps to improve. "I am not quite certain VA is getting the message that its construction program is dysfunctional and not in keeping with industry best practices or veterans' expectations," said U.S. Rep. Mike Coffman, R-Colo., who chairs the committee's oversight panel.