[whpalmer4]

Projects and action groups are only treated as available when their contents are complete. If you are showing Available actions, they only appear when it is time to either complete the project/group, or add more actions. If you are viewing Remaining actions, they should always appear, but will not be styled as Available until their contents are completed.

Have another look with this in mind, and see if it makes more sense now. Might be worth making a small test project, focusing on it in project mode, then checking off the actions one by one in context mode to observe the behavior.