I've had no problems ending an online tool ex-KRT itinerary in either CAI or DXB. [ime, ending the itinerary in AMM sends the pricing sky-high, and I haven't tried MCT.] I therefore concur that there's a bug, but since neither CAI nor DBX are in the same country as KRT, the rule logic can be made to work. I suspect therefore that the problem is in the online tool programming, not the rule per se.