I have booked a DONE 4 ex HND with AA through their RTW desk....As part of my itinerary I have YVR-DFW-MIA-LIR. ( for July 2019 )...now it appears that there is no D availability on my preferred days ex YVR whilst if I ignore starting in YVR and have DFW-MIA-LIR there is plenty of daily D availability....It seems as if AA dont want to sell D ex YVR or Canada for that matter unless the connection is longer than 24 hours...I now have to spend 2 nights in MIA rather than just overnight.....This is the first time I have come up against this issue in almost a decade of flying this route ....my current DONE5 allowed this without an issue...AA RTW says its all got to do with "markets" !!!...Can anyone share any light into this situation and whether AA are reluctant to sell D inventory ?