Been there, done that.
I have used gotprint for my b/c for seval years, and one of the first times that I ordered from them, I had an order for (4) different people in the same company, so it was a simple order for me. Same card layout, just change the names. I ordered them all at the same time, and the shipping came out to be something close to $44. I called them to question it, and they said that each order would be seperate, and they would most likely go out at diffent times (even though they were all placed on the same order).
When they came in, the (4) boxes were taped together, and (1) shipping label... I was highly "Tissed", and called them up. they went through the song and dance, and I think I got 1/2 the shipping charges refunded...but I thought that was really underhanded.