Discrepancy between plan and calendar # of weeks

Hi,
When I’m editing the plan, the number of weeks is set to 16.
When looking at the calendar, the total is 10 weeks.

Am I understanding something wrong?
Thanks

Oh my sorry, I missed this question. Did you figure it out? If you pushed to my plans it would be only the number of weeks (meaning less if you had time off) but if you push to calendar it should be 16.