There you have it, you had a long time collector/dealer look at note and have the confirmation of his option. For a note like this, it is very difficult to really understand the error and see the condition of the note through a posted picture making it very hard for members on the forum to confirm the error.
“Another thing was I got this note out of circulation so if someone really had the intention of altering it and then trying to pass it off, it wouldn't have been found in circulation”
I would have to question your statement. I have played around with notes to see how they are printed, put together, etc., and I do not have any of these notes any more, that’s right they are back in circulation. Why would I want to keep a fabricated error, the note is only worth face value, thus it can happen that you find a fabricated error in circulation. (A side note, I do try and correct or make it very obvious that the note has been played with before it goes back into circulation.)
As for value, this would be considered a minor error, and I am sure that Don gave you a price for the note, and it was not much over face. Due to the condition of the note, I would have to say the value would be a few bones over face.