it is normal that the pad keep contact with te rotor. that is how the disc brake system works. unless you feel resonablely hard to rotate the wheel, no repair will be needed. do not try to lose it, it may cause safety problem.
9 h8 y: a$ S+ P R: _1 ~+ w( k5 X' y0 Iit quite depends on where did you drive and how did you drive. but if it varies all of sudden, that is different.