I dunno 1bw, that is a head-scratcher.
Do you see a trade in the Level II by your broker? After the 30,900 mark there is just CIBC and RBC that bought. It appears you might have been part of the 1500 buy that CIBC made. Maybe they showed 2 trades together in the listing, and the other guy paid 20 cents each for 500 shares? Just guessing....
Cheers,
Bluenoser