The measurement instructions in the ad are confusing and misleading.  They walk you through how to measure the appropriate door (singular) width. I followed them and determined the door (singular) width required was 44", to cover an opening of 88".   So I ordered the kit with 44" doors.  When it arrived, each door was only 22" wide (for a total opening width of 44").  It was a pain to re-pack the pieces back into the box to return (plus the $75 return shipping fee).
The measurement instructions should clearly stipulate "opening width" instead of referring to door (singular) width.  It looked like I wasn't the first to have re-packed and returned these doors as it was evident they were not in factory-packaging condition (the instruction book was rolled up into a ball and just jammed in the box).