I'm looking for SEA-WAS on Sat 18 June: start out with Advanced Search, select First/Business, search returns 1-20 of 47 results sorted by "Best Match" (which makes no sense anyway unless that's the order in which DL thinks they want to try to fill up the flights; there's no obvious rhyme or reason -- duration, airport, price, departure/arrival times ... for the sequence)

I click "Show All" to get all 47 on one screen, then click "Sort by Departure" and poof! 1-20 of 47 results

ok, that's a PITA, but toward the bottom of the 20 there's an option into DCA for about $50 over the redeye into BWI ... not bad, but I'm not really thrilled about departing at 0645, so I click "Sort by Price" to see if that or a similar fare might be available on a later flight ... no joy, but no surprise since I know that long layovers don't always display in WAS searches ... I put SEA-DCA in the Modify Search box ... poof! search returns 1-20 of 50 flights in **all** cabins

c'mon, DL IT ... how difficult is it to preserve search criteria for a session?