Step 3 - Reorder the Testimonials
To make it so the most recent testimonial is on top, you need to reorder the list. To do that, you need to click the more actions button from Step 1 and then select the "sort/manage list" button. This will bring up a new pop-up window (Manage Item List) will appear, find the one you just added, typically the second one, and drag above the first one.
Note: a warning will pop-up, just click OK.