Share price and trading volume suggest the rights issue will be...

Share price and trading volume suggest the rights issue will be well supported.
Thinking of picking up some rights on the market.
However, I'm confused as to the timetable, which says:

Rights trading commences on 25th Sept.

So I can start buying then, right?

Record date to determine entitlements 1st October.

So how can anyone be selling rights on 25th if their alllotments are not ratified till Oct 1st?
Far as I can see, I couldnt sell any rights if I wanted to till I've been notified officially that I have them?
Seems quite a tight rights issue.

GZ (confused)