Rumours of another attempt to amend the constitution — which will see the next election revert from the current two-ballot system to the one-ballot system that was used in the last election — have been rife in parliament over the past couple of days. The talk irked the opposition bloc, especially the Pheu Thai Party, which was not awarded any party-list seat in the last election, despite winning more constituency seats than any other party in the race. The whispers emerged following an ongoing attempt to change the method of calculating party-list seats in the next election — which saw politic…