I created a multi-level list and linked the levels to the built in Heading styles. Heading 1 was supposed to be centered. When I click within the text of H1, the center button is selected and the ruler properly shows 1 inch margins on both sides. But the text is slightly left of center. If I click on the left-align button, the text jumps left, to a 1/2 inch margin, but the ruler maintains its position at 1 inch.

tia