Thanks @JeffSchwenk, are your referring to, using the multi column feature of the details section? That would work if the shipments were in qty of 100 or less, but this client ships in the 1,000 and 10,000s so that's why I wanted just the first and last serial number in the range. If that's not what you meant, then it would be great to have a new idea!
@ThereseLogeais tried your suggetions, and I'm still getting a line of the starting and ending serial numbers equal to the qty being shipped. I also tried using the running total summary by min and then by max and dropping the subreport. Still get the repeats equal to the number being shipped. It's just weird, why do serials repeat but the item detail section doesn't print the item six times if you ship six!