I believe transactions are being double counted in this report - counted once under Pinetree and then recounted under Inwentash (or vice versa). My reasoning surrounds the March 14th Disposal Transaction above. I distincly remember a couple of crosses for a 600,000+ share cross total from MacQuarie that day and this accounted for most of that day's volume spike:

Follow this thread from March 14/2011: http://agoracom.com/ir/probemines/forums/discussion/topics/474180-big-cross-by-macquarie/?message_id=1529435#message_1529435

Now with this Insider Report we know they (MacQuarie) acquired those shares form Pinetree/Inwentash. However, it was 600,000+ shares in total, not 1,200,000+.

That's my story and I'm sticking to it. Responses welcome.