I have played this version. The Pie Factory stage was not developed by Nintendo, but was a ROM hack that was outsourced to a third-party. This was released as a special edition of the game with the beta Pie Factory unaltered.
It is almost impossible to clear the Pie Factory after level 4, and it is 100% luck-based if you do. Fireballs can cross the divide, pies come out faster than Crazy Kong speeds, fireballs can go down ladders from the top level, pies group in twos, threes, and fours faster than you can possibly react, and pies flicker on the screen almost making them invisible.
TG does track this as it is an NES ROM, but no scores are posted. For the record, DK on the NES is one of the buggiest games I have ever played.