Changing contraception adviseable if spotting on pill?

Common. Many women will have spotting or breakthrough bleeding when starting the pill. By the third or fourth pack of pills, most women are bleeding only when they are supposed to - during the last week. Be patient and don't change until after at least 4 cycles.
Yes. Spottng on the pill may not require a change in contraceptive method, but just a change in brand of pill. Speak with your clinician.