I received an email from ScotRail that Advance tickets had just gone on sale for a particular journey; I was looking to buy three tickets – two adults, one child, with a Family Railcard, one-way.
If I enter those details, on a variety of different booking sites including this forum's, I am offered only 3 Anytime Day Singles, with the Railcard discount; no Advance tickets.
If I enter one or two adults, I can see the Advance tickets being offered.
I confirmed via Avanti's site (that shows the quota) that there are only two advance tickets available (and these have just gone on sale, this appears to be the full quota, looking at other days/times):

So my assumption is that if I try and buy more tickets than the quota (I want three, there are two Advance tickets), there's no way for the systems to combine using up the quota of Advance tickets and then adding on an Anytime on top. Now, if we didn't have a Railcard, okay, that's annoying, but I could buy two tickets in one transaction to get the two Advance tickets, and then buy a third Anytime ticket separately. But I can't do that here - because the system won't let me buy a third adult ticket on its own with a Family Railcard, as I'm not buying a child ticket. Even though I think we would meet all the criteria for travelling with the Railcard.
Is there any way to buy three tickets with a Railcard including the two Advance tickets, or is this an(other) annoying peculiarity of the system?
If I enter those details, on a variety of different booking sites including this forum's, I am offered only 3 Anytime Day Singles, with the Railcard discount; no Advance tickets.
If I enter one or two adults, I can see the Advance tickets being offered.
I confirmed via Avanti's site (that shows the quota) that there are only two advance tickets available (and these have just gone on sale, this appears to be the full quota, looking at other days/times):

So my assumption is that if I try and buy more tickets than the quota (I want three, there are two Advance tickets), there's no way for the systems to combine using up the quota of Advance tickets and then adding on an Anytime on top. Now, if we didn't have a Railcard, okay, that's annoying, but I could buy two tickets in one transaction to get the two Advance tickets, and then buy a third Anytime ticket separately. But I can't do that here - because the system won't let me buy a third adult ticket on its own with a Family Railcard, as I'm not buying a child ticket. Even though I think we would meet all the criteria for travelling with the Railcard.
Is there any way to buy three tickets with a Railcard including the two Advance tickets, or is this an(other) annoying peculiarity of the system?