VNX2 Concurrent SANCopy Sessions

Hello,

I am migrating data from a CX4 to a VNX2 with SANCopy. The CX4 allows me 8 concurrent sessions while the VNX2 only allows me 4. Shouldn't the VNX2 allow me at least 8? Also, the CX4 is the source and the VNX2 the target. Does the concurrent sessions setting only apply to the source anyway or does the target need to be set to 8 also? Thanks.