[Tim Wood]

We are still tweaking the expansion code. Having everything expanded by default might seem good, but in larger documents it degrades performance. OmniFocus goes to lengths to avoid fetching data it doesn't need, but if the rows are expanded, it has no choice (right now... I have evil plans for the future...)

That said, it should respect your expansion preferences and if it isn't, please log a bug via Help > Send Feedback. We have a few cases we know about, but the more we know about now, the more we can fix.