Deletion of additional text fields

Deletion of additional text fields

we are running 8.1 and although i have admin rights we cannot delete any additional text fields that are created. We have now hit 24 additional text fields and cannot create any more nor delete any. It is also not picking up changes to text fields in our other templates, only incident templates. For example i have added an additional text field within our incident template. When i click on a service request template, the newly created additional field is not listed as an option to add. It does not seem to have picked up the new change.
How do i fix this issue?

                New to ADSelfService Plus?