How to sync two different content types?
Assuming you have an Issue content type, and an Article content type

Install References and enable Node References.  On the Article content type, Add a Node Reference field (could name it "issue") and restrict its options to nodes of type Issue.

Then create a View of Articles and add (under Advanced) a Contextual Filter of Content: Issue (and if you are using url aliases for the Issues, then provide the Contextual filter with a default value of Content ID from URL).  Make it a Block display.

Then display the block on Nodes of type Issue, and it should work great for you.