This occurs when one physical address but has two logical addresses, each of them has its own alias as highlighted in the below output.
[root@sv230528:~] localcli --plugin-dir /usr/lib/vmware/esxcli/int deviceInternal alias list
Bus type Bus address Alias
-------- ------------------- -----
pci m00000003 vmnic2
pci s00000005.02 vmnic8
pci s00000005.03 vmnic11
pci s00000001.01 vmnic7
pci s00000005.00 vmnic10
pci m00000001 vmnic0
pci m00000031 vmnic4
pci s00000004.00 vmhba2
pci m00000004 vmnic3
pci m00008a01 vmhba0
pci s00000005.01 vmnic9
pci m00000032 vmnic5
pci s00000001.00 vmnic6
pci s00000003.00 vmhba1
pci m00000002 vmnic1
logical pci#m00000031#0 vmnic4
logical pci#s00000001.01#0 vmnic7
logical pci#s00000004.00#1 vmhba2logical pci#s00000005.00#0 vmnic10
logical pci#m00000001#0 vmnic0
logical pci#m00000003#0 vmnic2
logical pci#s00000005.01#0 vmnic9
logical pci#s00000003.00#0 vmhba1
logical pci#s00000005.03#0 vmnic11
logical pci#s00000005.02#0 vmnic8
logical pci#m00000032#0 vmnic5
logical pci#m00000002#0 vmnic1
logical pci#m00000004#0 vmnic3
logical pci#s00000001.00#0 vmnic6
logical pci#m00008a01#0 vmhba0
logical pci#s00000004.00#0 vmhba64As you can see physical address pci#s00000004.00 has two logical addresses pci#s00000004.00#1 & pci#s00000004.00#0 each with it's own alias vmhba2 & vmhba64 respectfully.