We use milestones to group items together for future and present work.
If the milestone is in the indeterminate future, we will put a date on it like 31-december-2020. This will get reset when it is determined that the milestone should become active.
The problem is if we have two milestones on a project with the same date. If both milestones have items assigned then the Open Items view only shows one milestone with all items from both milestones under it.
We can work around it by using different dates.
Hidden Milestones
Moderator: SourceGear