A few days ago, I started setting up my YJ Guansu. Like the idiot I am, I disassembled the core and lubed it, thinking that it made the difference. When I put the cube back together, I realized that an inner layer would not turn. I realized that the pieces were getting stuck on the knobs on the center pieces which were misaligned when I disassembled the core. I tried fixing it, only to make another layer unable to turn. Is there a certain way the knobs have to be aligned so that the cube won't lockup?