Is This $2.00 Canadian Bill A Possible Error?

Many years ago, I found this bill mixed in with many other Canadian bills. None were wet , by the way. The front of the bill is just as it should be, with no bleeding through. When I turned it over, I was stunned by the reddish ink smeared all over the back. Under magnification it appears to be the same color as used for the reverse design. Could wet rollers have smeared the bill? Your thoughts, please.