I could always use either one and the countdowns always were seperate. With the countdown counting down on both at the same time even tho only 1 was used! If both start the countdown after using one of them, there is no need to have both if they cant count down seperate. I just experience this since last serverdowntime. Like today i used Return to Battle, countdown started on BOTH, which made Renewal unusable for the next hour even tho i never used it