Mak,
You can see 2 different RxLevel on the same cell, only on the following cases:
MS1 is in Idle Mode (it is BCCH RxLevel which PC is not used)
MS2 is in dedicated Mode (it is Non-BCCH TRX RxLevel which PC is used)
Note:
PC is used for reduce UL/DL Interference, to save BTS/MS battery life etc.