As you've now done up a wheel nut or 4/5 see if the seat where the shoulder of the nut/bolt is on the wheel is even, or whether the paint/powder has rubbed off in just a thin line, indicating different angle and only touching in one place, it's the angle of the seat that needs to be correct, as both are without inserts, as most are.
Phone alloywheels.com as they sell the make you have and will know straight off whether you need new nuts/bolts.
tabetha