Crank bearing spinning in case...

[CDBiker220]

So i posted before about crank end play on and 07 EC300. Turns out the right side ball bearing was loose in the case, and the crank. Causing the crank seal to leak. It slides right on and off the crank, and their is ridge on the bottom side of the case bore so it needed popped out with a hammer, but when in the bore it would spin. Would actually move in the bore up and down alittle and in and out. Clearance on the crank was zero and not loose. but slid on by hand. Should be an interference fit on both crank and case correct? Might just send the crank and case to RB Designs...from his website looks like he can handle this. The rod and piston bearings seamed like new, so I dont plan to rebuild the whole crank if i dont have too. All other bottom end bearings were perfect other than the sprocket output shaft bearing felt a bit tight, might replace it. Any advice other then talking to RB?