Currently, the default for the Administrator role for new forms/stages does not receive all abilities in every stage. It usually has Read and Delete, but not Create or Update.
The Administrator Role should have the ability to do everything in every stage, as the default. And let the author remove rights as needed. I think most of the time Administrators need full rights, particularly for testing. It can be easy to think something else is wrong during testing, when it's just a matter of the Administrator role access not being complete enough.
If the Administrator should not have some of the abilities (such as create or update), these can be changed after testing.