I thought the same thing happened...lost order history...then I realized that you have to click on all orders, and there are multiple pages because only 1 or two orders show per page. See if that works for you ennui.
ennui, go to your accounts page, then click on order history, then all orders. In the lower right side of the orders grid, there should be little number (very easy to miss!!) that indicate the pages in your order history. Click on a number to bring up the page. See if that works for you!