You have a compute profile defined with two network interfaces:
compute-profile "Small" \
- network=net3
- network=net4

But when running:

hammer -v -d host create \
--name "test" \
--compute-profile "Small" \
--compute-resource "VMware_DEV" \
--compute-attributes "cpus=2,corespersocket=1,memory_mb=4096,...
--interface "type=interface,compute_type=VirtualVmxnet3,identifier=eth0,subnet_id=X,ip=xxx.xxx.xxx.xxx,network=net1,managed=1,primary=0,provision=1,virtual=0" \
--interface "type=interface,compute_type=VirtualVmxnet3,identifier=eth1,subnet_id=Y,ip=xxx.xxx.xxx.xxx,network=net2,managed=0,primary=1,provision=0,virtual=0" \

one would expect that the compute attributes for the interfaces to overwrite the ones defined in the compute profile.

However VM is always create with two interfaces in the vlans specified by the compute profile.

This behaviour has been noticed with foreman-1.11.0