Loft through curves not going 360 degrees

Hello,

I have another beginner question. I was working through this tutorial (https://www.youtube.com/watch?v=eA9Zh7VWw0k) and everything looked good until 26:21 when he used the loft component. His loft component runs 360 degrees, but mine leaves a gap (in the photo below) between the last two curves. I haven't found anything different between mine and his definitions. Does anyone know why this is? I'm sure it's some stupid newbie mistake, but I can't figure out how to get it to complete the loft. The closed loft option did not work. Thanks!!