The Obama administration's overhauled healthcare website got off to a bumpy relaunch Monday as a rush of consumers caused an uptick in errors and forced the administration to put thousands of shoppers on the HealthCare.gov site on hold. "Demand today has been high," said Julie Bataille, a spokeswoman for the Centers for Medicare and Medicaid Services, which is operating the troubled portal for the president's healthcare law. "We do know that things are not perfect with the site." Bataille said about 375,000 visitors went to the site before noon, about double the normal traffic for a Monday morning. The volume caused pages to load slowly and the rate of errors to spike.