Can’t figure these Mariners out? You aren’t alone. They went 5-1 on the previous road trip coming into this homestand, seeming to have righted many of the wrongs in the suboptimal start to their season.  Then they got swept by a middling-Royals team in a three-game series over the weekend at a packed T-Mobile Park, including a loss where their starting pitcher struck out 14 batters in seven innings of work.  Over that span, they put their two best setup relievers on the injured list and played without their All-Star catcher for three games, finally getting him back as a designated hitter. All has not been right in Mariners’ land. It seems to be continuous cycle — quality baseball for four or five games followed by it inexplicably dissipating into a series of mistakes and missed opportunities for a similar length. Panic? Yep. Aggravation? Always. That familiar fan fatalism? Snowballing.…