After we take an instant-points action, there is normally a prompt that pops up indicating that we have received points, and also our name is listed in the Recent Activities box (on the right side of forum pages).
Something changed recently that is causing the action to sometimes not completely register (no prompt and no name listed in Recent Activities).
The work-around is to log out before you take an action, then sign in only once prompted to do so, then log out again before taking the next action.
This has happened to me both yesterday as well as today. It has been a troubling matter for I thought this was due to my computer though now I see it is not due to that.
I am glad it is not something wrong with my computer other wise it would mean a problem to fix.