S4 on travel net

Ever seen this. Listed my sister 3 months ago, she can't go at the set date now. I go into to change the dates - instead of her 4 legs, there are 9. Leg 4 on her rtn flight shows 3 flights with the same flt number. I try to make the change to the new date by cxn all the flights and adding more, click to confirm and red colored msg says, ERROR - Please contact Reservation Sales for assistance. ALLOWED WITH DL -MM- SEGMENTS ONLY
Contact them now or wait until after the original date expires, would they clear out and then become a record which there are no flights found and then be able to build it again? :confused::confused:

I see this frequently, since we use previous yr passes (good for 1 yr from issue--we use just prior to DOH anniversary). New flt schedules, times, A/C, etc.
I remove all but one flight, add new flts to replace them. Next move, correct first flt is necessary. Usually no additional cost (minor taxes?)
Anyone else have a way?

I tried you tip, no good. Going to have to call resv... Error in updating your Reservation. SOA Services: CK SEGNO

? Call Res..800mydelta