I have been working on laying out a rulebook over the past couple days using Scribus. It was looking great when I view it as a viewable PDF. Today when I decided to test out the imposition by building the PDF with the bleed, the order of pages seems to print just fine... but I have run into an issue with the actual print itself. This may be a simple fix, but I've not been able to figure it out.
Instead of my left and right facing pages touching each other (as I need for a saddle stitch) they remain separated and give me crop marks for around each page. Like in this example, excuse the rough image. The red represents the bleed, the yellow is the margin, and the blue is the safe zone.

How I want it to appear on the printable PDF is like this

Now I don't know if this is a Scribus issues that I'm not adjusting a setting properly, or if I'm doing something wrong on the Adobe Acrobat side of things wrong.