This is bad.

Guys, even if the axles were touching, it would still rotate just like a mini-spool install. A buck says its your bearings. They are like big skateboard bearings, they should only be retained, not torqued like Timken loaded thrust bearings? You stated the axle slipped in doesnt rotate or is it when you torque the plate back on? Take a string or stiff wire and put it all the way through and measure the bearing seat distance. Then measure your axles. Should be less than bearing seats so the axles will not touch. Spacer or not. I dont think you even need the thrust block with green bearings as they are the sole retention mechanism for the axles, right? I never used them so i could be way off....but thats what's been said.