issue (news) came out in August not in september, and these options are vesting this month and the expiry date is pre-defined from 2013, so the message will be: company capital increase rather than insider selling (they don´t own the stock, they own the option, reporting is different) and there should not be any wrong signals associated with this especially with expiring dates
my interpretation is that the CFO and CBDO are convinced that the share is way under-valued