Thanks every1 for your replies. I guess I should have explained a little better.
I have items that sell frequently, so I have bought special packaging for each. If I ship the thin envelope with the box that is a little shorter, the envelope may get crushed on one end or the corners. I was having the boxed item dropshipped up until Nov. '07. This is the first time I've tried shipping both on one order myself. I hope that explains things!!
Thanks!!