Consider a look at it this way E: the company is buying back but they are treasury shares intended to be reissued. HAON also has the ability to issue new shares and they do (still below the A/S total).
If they reissue all treasury shares and add in new issue, the O/S and invariably the float goes up. Not a mystery to me.
The mystery to me is WHAT ARE THEY DOING WITH THE CASH FROM SELLING THOSE SHARES? Conceivably they could even make money by selling treasury shares at a profit from purchase price (buyback at 2, sell back at 3 - a 50% profit give or take).
Just waiting on getting news of where all of this money is going - got to be doing HAON some good and in tandem, share holders would eventually expect to see some green rather than these low prices.