Wow, this is such a terrible community. First post from a new member and you treat it like this. Sad.
Either way, i've designed and published plenty of print media ads and i can tell you without a doubt that there are a great degree of batches when printing, and that you don't print all of your desired copies in one sitting... unless you want to waste an ungodly amount of ink and money. Progressively calibrating printers and cmyk % and artwork tweaks always occur.
If it isn't significant to collecting, then great! That's all i was looking for. Thanks for the warm welcome ppl!