She simply mis-spoke. And I think it makes conservatives look like apologists when they look for ways to make it appear she said it intentionally. She simply made a mistake.
Really. And how did she do that when Revere DID warn the Regulars that 500 men were waiting for them and that "their troops had catched aground in passing the River"?
Letter from Paul Revere to Jeremy Belknap, circa 1798 - Page 4
The link is to the Massachusetts Historical Society.