George Washington's was America's first President - This is indeed not true

Peyton Randolph of the Continental Congress was appointed as the first President during the American revolution. On his orders, a Continental Army was created and Washington was appointed as it's commander. John Hancock succeeded Randolph. He congratulated Washington after he defeated the British in the Battle of Yorktown. The reply which Washington wrote was addressed to 'The President of United States'. Washington was elected President eight years later and so, he was the fifteenth US president, not the first.