With my bike on a rear stand, it feels smooth to rotate the rear wheel and I have about 1" of chain slack. While it was still on the rear stand, I dropped it into gear (I know I shouldn't be doing this) and let out the clutch slowly and I noticed the chain seems like it's clacking about and coming off the chain guide randomly. I cleaned the chain with a chain cleaner and applied Chain Wax almost to a point of excess, but I'm sitll getting the unsmooth chain action. I was thinking of bring it back to the place where I got my tires recently because I thought it might be an alignment problem. When I ride it, there aren't any real problems however. Any thoughts?