<div><p>Yes, X-Men #90 contains a re-print of the story first printed in X-Men #42. (The other stories printed in each issue are different)</p>
<p>A comic book issue is in many ways similar to a book edition or a musical release versus a book or musical album. You wouldn't say that so and so event happened in the first edition printing of a book, you would say it happened in the book. I started a <a href="http://www.freebase.com/view/guid/9202a8c04000641f80000000137a9504">discussion</a> on the Comic Book Story type asking that a property be added to record the first issue to carry a particular story. That way it would be a simple matter to write queries going from a character to the first issue in which they died. (or any other such links)</p>
<p>As far as who is responsible for a topic, if you go to the members page for the base of a type, you should be able to see who the administrators of that base (and by extension, type) are. (ie. <a href="http://www.freebase.com/view/comic_books#domain-members" rel="nofollow">http://www.freebase.com/view/comic_books#domain-members</a>)</p></div>