Hey @dcasey720, regarding your question about section prerequisites: What you’re after isn’t currently possible out-of-the-box with Open edX: A subsection from one section can’t serve as a prerequisite for a subsection from another section, so you can’t model section-level dependencies in the way you describe. Your configuration is correct.
If “x-flow” is the same as flow-control-xblock, you might find the following thread interesting: Flow-control-xblock : anyone has experience?.