1999 Crisp $10 Ten Dollar Frn Federal Reserve Note Overprint Back Number Error

  

The ERROR on the back of this note looks highly unique and unusual. The back appears to have a blotch ink errors in a few places that I can't make of.

Or was there a number being printed? Or was there a blotching of the ink?

Or were the threads on the paper material smeared? You can decide for yourself. NEVER SEEN ANY ERROR LIKE THIS BEFORE.