What am I doing wrong here? (margins)

I'm not sure what I'm doing wrong here. I created a half-letter-size document (5.5" x 8.5") with a half-inch margin on all four sides. I got a red margin far away from the actual document (see photo). When I printed the document, the "passport" showed up on the lower right-hand side of the printed document.

I'm a little rusty in InDesign. Used to use it on a daily basis but not anymore.

Thank you!