Will have to look at picture tonight. Office computer system doesn't permit pictures from shared websites (we get the red x in the box). Usually you would add one bead onto a string otf them that is exactly the width of your row. This is where you might have to adjust lane width depending on your project & the beads.
As I worked the lanes on the military ribbons, I found that the various colors of 'same sized' beads (16/o in my case) beads varied in actual size. This produced a very distinctive antique look to the final result. I'm glad it looked that way, instead of resembling a perfect loom strip.
-B- "We do not inherit the Earth from our ancestors, we borrow it from our children."