Something is odd about my U.S. 24 that I recently purchased.
1) If you take a look just above the "T" of postage you will see part of the border missing.
2) If you take a look at the "G" of postage you will see that the letter is smudged.
3) If you take a look at the "E" of cent, it looks like a piece of thread was left on the plate.

It was for these reasons that I bought the stamp in the 1st place.
No, I don't think its a double transfer, just a poor quality stamp.
Yes, there is a small tear just below the letter "N" of cent.
Art