KANSAS CITY, Mo. — After right-hander Brady Singer turned in another dazzling performance on the mound and his teammates put together a five-run inning to stake him to a six-run lead, the Kansas City Royals appeared set to cruise to victory as they closed out their homestand. Instead, it turned out to be one of the rockier cruises you’ll ever see as the Royals’ bullpen yielded seven runs in the final two innings of a 7-6 loss to the Minnesota Twins in front of an announced 15,482 in the finale of their three-game series at Kauffman Stadium on Sunday afternoon. With the loss, the Royals were sw…