I was just telling you what you discovered.
If you define resource in weekly buckets then a demand (so) of 1 unit will have a duration of 1 week.
The same results will occur if you change the PPM/PDS duration to 7 days also.
There is NO way to have capacity considered for a week.
To be honest, this is not logical. You need to remember CTM is daily bucketed planning.
It plans/creates an order each day as it will create orders when needed.
What you are thinking about is weekly lot sizes. It has nothing to do with capacity.
Ken