Ppto on key dates

I’m trying to understand how PPTO works on key dates. My team leads, coach, and coworkers have told me that I need to use double PPTO. That if I only use 8 hours of PPTO to cover a shift, I would still receive one point, and I would need an additional 8 hours of PPTO to cover the key date. So, does that mean I need to use a total of 16 hours of PPTO to cover one key date??

I’ve read online that PPTO works like any other day, meaning that using 8 hours should be enough to cover a full shift without getting any points.

If I use 4 hours of PPTO for my 8-hour shift on a key date, how many points would I receive?

Has anyone used PPTO on a key date and knows for sure how it works?