Marvel was notorious for missed deadlines/ reprints in that era. The revolving door at Editor couldn't have helped. In about a year, the Avengers printed a reprint from Amazing Adventures, a two part fill in story and then missed the much hyped Avengers 150, which was supposed to introduce the new team. Instead we got a couple new pages and a condensed reprint of #16.
Heck, Jungle Action #5 announces the start of a new Black Panther series and instead has a bunch of reprints in it.
It happened often enough that I learned to flip thru a book before buying, although I mostly bought them anyway.
I can just imagine asking the old lady that ran the candy store I frequented for a refund because the book was a reprint.