Hole pattern - symmetric about center hole in two linear directions

Ok...I thought I could do this, but I keep getting two holes in the center.
I've created the center hole and am trying to pattern one to the right, horiz, 100mm, and one to the left, the same distance, in the same command. I can pick the two directions and offset, but keep getting a duplicate hole in the center. Number of members in both directions must be two or I get an error.
I would think this can be done without getting a duplicate hole in the middle, but maybe not? If someone could shed some advise I'd greatly appreciate it!

