When booking DDP with a package

[DebRMN]

We are staying 10 days/9 nights......I am only getting the 9 day MYW tickets.
I also got the dining plan.
Will I have 10 TS, CS & snacks p/p or will it only be 9?
Does it go by the length of trip (at disney resort of course) or the length of ticket?

 

[BBGirl]

9 credits. It goes by nights at the resorts.