Weddingbee boards

So we bought an invitation kit thorugh Micheals, designed our invitations using Microsoft word, and went to print off a sample invitation on cardstock yesterday. We fed it through the front of the printer (it is a Samsung ML-1710 laser, about 5 years old now) and even though the text was centered and margins equal on the computer, the printer REFUSES to print the text in the center! Has anyone else had a similar issue with centering when feeding paper through the front of a printer? According the the sizing in the front loader, it should come out perfectly, but instead it is slightly left justified.

We thought about just messing with the margins on the computer to make it so it prints normal on the printer (even though the margins are really not equal, if that makes sense). Ugh, I am so annoyed, because if this doesn't work we will have to pay a printer to print them, which we really didn't want to have to do!