Software iSCSI Initiator - Network Configuration - VMkernel Port Bindings. Active / Active vs Not Used / Last Active

So I have two hosts in the same cluster setup the same exact way.. One host is using both iSCSI vmKernel ports while the other isn't.. Can someone tell me what sets this?

Using software iSCSI to an EMC VNX 5300.

Thanks

ESX01     

• Storage Adapters > Network Config > iSCSI_1 Not Used, iSCSI_2 Last Active
• iSCSI_1 / vmk1 / 192.168.10.41 – Can ping all 8 SAN iSCSI IPs
• iSCSI_2 / vmk1 / 192.168.10.141 - Can ping all 8 SAN iSCSI IPs
• SAN can ping both host iSCSI IPs
• NIC Teaming setup correctly. Dynamic and Static discovery setup the same as all others.

ESX02

• Storage Adapters > Network Config > iSCSI_1 Active, iSCSI_2 Active
• iSCSI_1 / vmk1 / 192.168.10.42 – Can ping all 8 SAN iSCSI IPs
• iSCSI_2 / vmk1 / 192.168.10.142 - Can ping all 8 SAN iSCSI IPs
• SAN can ping both host iSCSI IPs
• NIC Teaming setup correctly. Dynamic and Static discovery setup the same as all others.