Thanks Koo....your read of the situation may be correct, the drop in the PPS may very well have led to short sellers covering of a sizeable chunk off the 700 odd thousand shares that were short (maybe all of them) when TLD failure was announced, the volume was certainly there.  

We'll have a better idea when the numbers are updated....here's the link again: 

https://www.iiroc.ca/industry/marketmonitoringanalysis/Pages/consolidated-short-position-report.aspx

I suspect the updated numbers will be published this morning at or just after 07:30 am EST.  The latest update will be for trades settled up to October 15th, so it will include all the trading after the Sept 30th news.