How do you list volunteer hours if it's an opportunity provided through an extracurricular org?

I'm assuming you can't double dip so I'm not sure what to do.

For example, if I list an organization that I was a part of on OptomCAS, should I just count my hours of involvement as general meetings, fundraising, etc.? And then list the volunteering I did with that org as a separate "experience"?

Or should I just combine the volunteering hours with the total hours when I list that org?

What did you guys do? I'd appreciate any help you could offer!