Test to Live will always transfer all the design changes. This is by Design and how i read the Doc, this is due to it being transfer purely at a SQL level.
If you want to select a few items to transfer you can use Design Transfer but it also has it limitations.
It would be worth raising a ER if there is not already one to have customize options on T2L.
Thank you for the information Paul.
Do you know if it is possible to have different approvers in the test system to the live system which wont port across when we do a test to live?