[whpalmer4]

The Due Soon view only shows actions which are past their start date, or have no start date. In the scenario you describe, the actions will appear on the Due Soon list 18-13=5 hours before they are due.

The iPad Forecast view, which is an expanded version of the Due Soon list, does show the actions which have not started as well as the ones which have, but styles them differently. Whether or not to show the actions which have a future start date seems to be a matter of some contention, as I recall many complaints on the forum in the past about how the Mac showed them, and the people complaining regarded it as undesired clutter. Most of the time I want to be aware that there is an upcoming due action where I will only have a short window to work on it, but I can see if that is a common characteristic of one's work rather than uncommon, it might be annoying.