Heya, glad you're enjoying the game!
I just had a look at the game files on here for Linux, and the level "Infinite Loop" is set to grant you 6 cones as it should. Had you maybe placed 2 cones already? Try launching the level again and see :)
What the heck?!? I've just fired up the game and you're right, 6 cones it is.
My mind must be playing tricks on me, as I'd swear I only had 4 yesterday. Oh well, thanks for the reply and sorry for bothering you over nothing. :S