The section "Certificate Transparency extension" in certificate profiles was built in a "hacky" way before being converted to JSF. Now that we can use radio buttons and ajax properly, there's room for improvements:
The three checkboxes "Use in new certificates [...]" should be changed to radio buttons since it's a one-selection-only.
Same goes for "Minimum number of SCTs" / "Custom". One selection only --> change radio button. Make sure invalid combinations are not rendered together.