When should I start worrying if points haven't posted to my account?

I know Amtrak says it can take up to 21 days for points to post, but in the past I suppose I've been fortunate as they've never taken more than a few days.

I had invited two friends to join AGR and we took a trip nearly two weeks ago. The points (and bonus 500) hasn't posted for any of us, even after sending in a missing points request.

Do you think they are 'lost'?