Thanks guys. I have been reading the other threads and i looks like it could potentially be a limit on the number of stops/legs for a round trip award ticket?

Unfortunately this morning Im trying to pull up the same route that gave me no problems last night (SFO -> IST, IST -> KIL, KIL - SFO), and getting a website error right off the bat - doesnt even show the limited options anymore. Gah!