I know it's probably not the right place but all this talk of the web site and it's limitations reminds me of my most recent visit. Mrs UXB is going to old blighty at the end of this month and many moons ago I had booked her favorite J saver seat MEL to LHR. 11K on the 777W all the way. She works out recently that there are not enough retail therapy days for her in the big smoke so asks if I can get her there a day earlier. Some quick research on the app finds an F saver a day earlier so I think "nice treat F all the way and New F SIN to LHR so long as no equipment changes" . The points cost extra is 31875 so I think just do it. the website processes the change in booking, small charge in extra fees, fine I think ,then says refund 2000 odd points and then shows me the maths!
112625 (F saver to LHR) - 80750 (J saver to LHR) = 2000+ point REFUND ( I forget the actual number) that's logic I think
So there you are it's completely stuffed
Cheers DangerUXB
PS when do you think I should tell her the good news? she still thinks she's going in J!