It's hard to say for sure without looking at your database, but if an action is in a sequential project and previous steps aren't done yet, the action isn't available.
That's one thing I can think of off the top of my head. If that doesn't explain it, you'll want to contact the
support ninjas - I'm out of the office right now, so I'm out-of-sync with the folks I discuss stuff like this with by a couple of hours.