Hi,
could it be that you're using EMC Powerpath/VE?
If so, PP/VE added it's own path selection policies to the ESXi hosts, but those aren't displayed in vCenter.
To check the policies used by PP/VE you could use the
If so, the used path policies aren't visible in vCenter, instead you could use the PP/VE vAPP to check them.
Regards,
Ralf