If I want to see tomorrow's tasks in order of priority, how do I do that?
The "7 Days" view is automatically sorted by priority and date. So that view will give you want you want.
Unless you have a time inserted in the due date, then it does not sort with priority.
It's actually the opposite - if you add a time to the due date, then these tasks will never follow the priority sorting, but always use the due time order, below them, tasks without a time will be sorted by priority.
Sorry, I misunderstood you, that's what you meant - it'll sort by priority unless you use a due time, that's correct. :-)
Is possible force priority over the due time?
No, there is on way to force that over the other.