Question about amazon shipping

[DutchBoy]

Whenever I see something I want, my solution is to 1-click order everything.

What I run into problems with, of course, is when I order something in April say for a June release, and then something is set up on the calendar that I want later for the same day (giving me two separate orders for items releasing on the same day).

My question is (for those with more amazon experience with me) does Amazon automatically combine those on the day they ship? I'm guessing not because they're a business and want money (no matter how good their customer service is) or do I just need to cancel them and reorder them? Would an email to them suffice? I tried their "combine orders" option on my order summary page, but it never seems to work for whatever reason...

Thanks!