vm disk restore

Hi 

Below is my setup.

Prod Site - BE 2012 , ESXi 5.5 . 

DR Site - BE 2012, ESXi 5.5

I am backing up a VM using API in prod site. The VM has 3 disks which show up as below

servername.vmdk

servername_5.vmdk

servername_1.vmdk

I take the tape frpm prod site, perform a catalog on the DR server and then do a restore of the VM.

The restore job completes successfully however the 3 disks get renamed as below

servername.vmdk

servername_1.vmdk

servername_2.vmdk

Is this default behaviour and is there a way to keep the vmdk name as in original.

Thanks