[Greg Jones]

I find OmniFocus to be very consistent in the tasks that are displayed, based on the various availability filters. The various settings follow a pattern of no restriction to very restricted as to what the user sees.

Ignoring the subtle differences in sequential projects and single-actions lists, here is what you will see using the filters.

Any Status: Self-explanatory, all tasks will be shown regardless of completed, next action, availability, etc.

Remaining: All tasks but for the completed tasks.

Available: All remaining tasks that are not blocked by a start date and/or another task in a sequential project.

Next Action: Only the next in list, remaining task in each project that is not blocked by a start date. This is the most restrictive filter of all, as it treats parallel projects as if they are sequential.

Given the above, your example task is considered to be a next action task, but it is not displayed because it is blocked by the start time. However, I don't understand how your results can change by bumping the start time out one day later. A task with a start date/time in the future will always be blocked in the next action view, regardless if it is set to start 1 minute from now or 1 month from now.