Provisioning Templates

I am seeing in my provisioning templates that one of my templates is generating additional copies of the same template (albeit with the date/time in the name -see picture below). These copies are marked as locked. I am unsure exactly how/why the are being created, but I believe it may be creating copies as I modify the unattend file that is linked to one of the provisioning steps. I am using LANDesk 9.6 SP1.

Here are my questions:

1. Why are the being created - What triggers it?
2. Are the OK to delete or will I mess something up?
3. Can I prevent them from being created in the future?

Thanks,