By one metric, CSX Corp. is doing well: Despite the market being more volatile recently, the Jacksonville-based railroad’s stock price is still hitting near the same highs it has for the past year, since its board decided to bring on E. Hunter Harrison and implement his precision railroading model. $59.25 a share (where the price peaked in January) — that’s a great number. Many of CSX’s other numbers aren’t. Customer complaints are up. Employee lawsuits are mounting. The number of…