So I'm completely new to subscribing to Marvel print comics and I'm confused about how it all works.

I subscribed to the amazing spiderman a few months back through Marvel's print subscription portal and have been receiving issues from the chameleon conspiracy.

I was excited to see how everything resolved, but I never received the Giant sized issue with the resolution. Did i have to order that separately or is that coming at a later date?

And now I'm reading the prelude to sinister war and i see it says at the end coming soon "sinister war part 1 and issue #71 of ASM." Are these two different things??

I'm very confused, but would like to follow the story.