The VMware Knowledge Base provides support solutions, error messages and troubleshooting guides
View Composer uses first available disk slot to add disks which may result in "user data disk" getting added before "system disk." (1007706)
The workaround is to always use the first available SCSI slot for disks in the master clone so that when View Composer adds disks, it adds them after disks present in the master.
This problem is fixed in View 3.1.
Request a Product Feature
To request a new product feature or to provide feedback on a VMware product, please visit the Request a Product Feature page.