How do I transfer only the disability amount from my adult son with a disability and not the Canada Caregiver amount?

[mcsang]

Turbo Tax 2017 wants to populate line 307 on Schedule 1 even though I did not check the caregiver box, only the Disability Transfer box. 

[TurboTax-Esther]

If you have an adult son who is disabled, you qualify for the Canada Caregiver amount as well.