How many paths should be Active for ALUA Storage Array ?

Hi,

We have enabled ALUA in CX4-240.  Then we restart those ESXi 5 Hosts.

To our suprise, 2 of them have 4 Active Paths - 2 Active + 2 Active (I/O).  On the other hand, one of them gets 2 Active Path - 2 Active (I/O) + 2 Standby.

We would like to know which one should be the correct one ?  Is there any suggetsion on why different hosts give different number of active paths ?

Your advice is sought.

Thanks