For problem 1, you may get a improper ramping cofficient for your mid_PCLs, tuning your ramping cofficent for corresponding PCL and check if it turns better.
For problem 2, there may be certain harmonic disturbance, as your sensitivity goes bad every 15 or 30 ARFCNs[br]<p align=right><font color=red>+5 RD币</font></p>