Clock fluctuations are normal because you have EIST enabled, so when the CPU is idle it switches to LFM (12 x 189.3 MHz = 2271 MHz).
All clocks up-to ~4.2 GHz (22xBCLK) are correct except the 4.9 GHz. That value seems to be miscalculated, I'll check how can that be fixed.
If you want to run always at a fixed frequency, then you need to disable EIST, however in that case your CPU will run out of specification.