I think that is just bad reporting. What it says is you can't assign a caregiver and be a caregiver. They even quote the law in the beginning of the article.

"A patient who has designated a primary caregiver for himself or herself may not be designated as a primary caregiver for another patient."
SprngsCaregiver Reviewed by SprngsCaregiver on . Illegal to be a patient and caregiver too now?!?! Westword article Medical marijuana patients may have to find new caregivers because of language in new law - Denver News - The Latest Word this is crazy!!! Rating: 5