Sorry to say but you are wrong. 500 million Q2C is correct.
Number of coins Already changed to 500 mil... dev (Kresu) did it (you can check it by your self visiting https://github.com/qubitcoin/QubitCoin/blob/master/src/main.h and then searching for MAX_MONEY = 500000000 * COIN - its there on line 51 (maybe dev forgot to tell you all that; or maybe it was a last thank you gift for you all).