Nothing strange about XM pads. Remove the pad and wind the calliper piston back with large screwdriver or bar. This resets the handbrake mechanism so it can then take up the slack as the pads wear down.
Just a little unusual as the front brakes contain the handbrake. Nothing overly complicated, just treat as if you were doing the rear brakes on a normal car (i.e. you might need to enlist the help of a piston wind-back tool)