Why are you surprised ?

You cant have

physicalRAM = 32gb
pagefile = 0
memfile = 0
total VM RAM = 24gb
prefvmx.minVmMemPct = "100"

it may work with

physicalRAM = 32gb
pagefile = 0
memfile = 0
total VM RAM = 16gb
prefvmx.minVmMemPct = "100"

With
mainMem.useNamedFile = "true"
you should be able to run 2 VMs a 12gb

With
prefvmx.minVmMemPct = "50"
mainMem.useNamedFile = "true"
you should be able to run 3 VMs a 12gb

With
pagefile = 32gb
prefvmx.minVmMemPct = "10"
mainMem.useNamedFile = "true"
you should be able to run 5 VMs a 12gb or even more

Read
http://faq.sanbarrow.com/index.php?action=artikel&cat=78&id=116&artlang=en
http://faq.sanbarrow.com/index.php?action=artikel&cat=78&id=76&artlang=en
http://faq.sanbarrow.com/index.php?action=artikel&cat=78&id=78&artlang=en