Not weird.
You have a figure swapper in the area.
Likely, the person bought $5 joes at Walmart or Zellers, then bought the TRU exclusives at $10 each at TRU, swapped the figures out for the $5 ones and returned them to get their money back at TRU, therefore getting the TRU exclusives for $5 each.
I hate these buggers. Happens more often in the US, but I've seen it before here in Canada as well.