When you've added an Amazon capsule to your hub on the edit page, position it right above a plain text capsule. Once it's there, look for the string of buttons across the top of the Amazon hub -- there should be a few arrow buttons. One pointing up (clicking will move the capsule up one position), one pointing down (clicking will move the capsule down one position), and one pointing to the right. Click the arrow pointing to the right, which will make the capsule half as wide and move it to the right, next to whatever capsule is below it (that's why you want a text capsule there).
Another tip -- once you get it positioned next to the text, when you go in and edit the Amazon capsule, you can select to have a background color. If you pick gray or light blue, the Amazon capsule will stand out nicely on your finished hub.