The A/S has never been 5 billion.
On 1/11/2012 they filed to increase the A/S to 1,500,000,000 in an effort to secure funding for the mine.
Later that same year, the re-evaluated their position and retracted that increase in order to maintain value in the common stock.
On 1/22/2013 they filed to increase the A/S to 990,000,000 and that is where it remains today... under 1 billion.