Ann: Annual Report to shareholders, page-2

Hey everyone, i'm a recent holder, mostly options at the moment. I've been doing some research but with admittedly it's out of my depth to clearly grasp certain details, namely the metrics of the resource and the register depth. If i'm correct, so far there is a 230M+ inferred resource with ok grades, which could potentially improve as more drilling, testing is done. Also, according to marketindex.com there are currently 440.6M shares on issue. Plus there is also another 420 million options that could possibly be exercised by the end of next year. On top of this there is 300M "partly paid ordinary shares".. i'm not sure what these are... could they be the rights issue shares?
In the top 20 (not sure what date this number was calculated / updated) , it says there are 1.25B shares currently held (52.3%) so with the additional 47.7% held outside the top 20 is another 1.1B+ shares???
Just trying to figure out which numbers are accurate. Why does it state that 440 million shares currently on issue when the top 20 own 3 times this amount? Of course some may be in escrow, performance shares that are not yet released? Sorry if i sound like i'm confused, but that is because i am!
Can anyone who is literate in these things shed some light on the situation? TIA.