Ok, same trouble on the return (trying an open jaw or stopover). Here's some specifics:
7/23
CHS-ATL DL825 arrives ATL 0632
ATL-SEA AS745 departs ATL 0900
SEA-PDX AS2015
All show F award availability, but if you try and book CHS-PDX it shows no availability, and only has availability on 2 days!
Ugh!