Now allowing me to select 2 seats but when I try to add them to my basket I now get that error message too 🤬

Both my sons are regular attenders but one is in a work meeting in Dundee and the other is at one in Leeds so they have no means of trying to get one themselves.  One of them did get in before their meeting but got the error message below.  

That is why I held off taking my own ST place during the priority window and took the risk of the 10 o' clock rush, I anticipated that you would get one shot at the website and so it turned out. There was some disgruntlement over the number of priority tickets ST holders could take for the big leagues cup games, so maybe that influenced the thinking here