Number of awarded points is not being displayed correctly.

Lately I've noticed a strange bug-like behaviour of the site:

As you can see, I was awarded +5 points for a question. However the little box on the top of the screen says that I've got +3.

I know it's not a particularly big flaw, but this has happened more often to me. Am I the only one who's having/has noticed this "problem". Or is there perhaps an explanation for this.

• One thing that can happen is this: you are not notified when you loose points for some reason. Thus, if you have -2, say due to a down-vote, and later +5, then the change since the last increase will be shown, so +3. However, normally you should then see in the list this negative event too. I am thus not sure what exactly happens in your specific case. – quid Mar 26 '15 at 16:32
• I think it is changes that are a result of posts being deleted that do not show up in that list. This also includes points gained from downvoted answers being deleted. – Jonas Meyer Mar 26 '15 at 17:10

You lost two points for an approved edit suggestion when this question was deleted (by Community♦) earlier today, so your reputation change of $(+5) + (-2) = +3$ was indicated in the top bar.