When I create a filter as follows, it only shows tasks that have a specific start time of today and not also tasks that had a start date of yesterday and earlier. Basically, I'm looking for a way to show all tasks that I have assigned a specific context and that I need to focus on. If I just click "today" I can see everything that is today or earlier, but it's for all of my contexts and not just one.

Status = Uncompleted
Context = Work
Start Time = Today