There is also a buffer to either side of the seating. Here it shows the boundary line:
There are about 2' of space on each side between the chairs and the rectangle I set for placing the chairs, so I lose about 1 chair from each row, and a full row of seating.
Offset first row only fixes front and back, not sides. When I do offset it to where I want the front row to be, there is enough space for an additional row to come into the block, but it doesn't. When I offset it far enough back, a row will be cut out, so I expected the program to add a row when there was space. Does that make sense? Screenshot of new offset placement:
[img:left]http://i.imgur.com/eZhRTYy.png[/img]