shapes, colors, numbers

Today, I put a half dozen shapes on my computer screen.  Some were yellow, some red, some green, some blue.  Then I asked Andrew to tell me what color the triangles were, what color the circles, etc.  Then I asked him to count the different shapes, colors, etc.  He can now count to three fairly well.  He does not realize that when he is counting, the last number is how many of something there are.  Suppose there are three squares.  He will count  1, 2, 3,.....then I will ask him, "So how many squares?"  He will reply, "4!"  Ugh.  Any ideas?