Any idea how I can fix it without having to actually change my wheel studs.
The 1/2" wheel spacers are too narrow to fit new studs into, so they just slide over your existing ones. It's almost like using a big washer between the hub and the wheel. They can still technically be hub centric, at leastWhich wheel spacers are you trying to use? I wouldn’t use anything other than lug centric spacers. Those should give you new full length lugs to slap your wheel onto.