Hi @Sophie_Nicole_Casey ,
Welcome back to the Asana Forum
This is expected behaviour in the Week View. Changing it would break other workflows. The team is working on adding some filtering features to this view. Check this out:
You probably know that already, but you can use the List view, order the tasks by Due Date and they will respect the due time too.
I usually use the week view to plan the week and get mental order by sorting the tasks manually in order of importance or relationship; then I switch to the List view to focus on the day and get things done. The week view has too much information for deep focus for my taste
Cheers,
Rosario