It was an across the board error since Sunday which they appear to have got round to fixing.
Yeah, I (1000 points) checked earlier and was able to add all 3 games to my basket and proceed to check-out (but didnt as I cant attend of any these games). Just went back on now and it's giving me the Unspecified Error message when trying to add my reserved seats. So the loyalty points limit seems to have been put in place. Just wonder how many snuck in there before the fix..