Stevie Wonder - Do I Do

On a couple CDs listed in the database, the hit "Do I Do" by Stevie Wonder is listed as "45 version" with a run time of (5:01). The note at the top says commercial copies were all (4:56), which is a five second discrepancy.

Do the (5:01) versions have an incorrect fadeout? The reason I ask is because the fade is quite awkward. Just as the song goes to only percussion (and coincidentally right after 4:56), there is a very quick fadeout. Can anyone verify?

I also have a 2nd promo 45 for this. Below the title and artist, it clearly states "WITH HARMONICA SOLO", and has both a listed and actual time of (5:18). Aaron has compared this version to the 10:00+ LP version, and informs me that unique audio not found on the LP exists on this 2nd promo 45. Aaron, feel free to provide more specifics on the unique audio segment.   

Yes, Jim is correct. There is a short section right before the harmonica solo on this DJ version (and commercial reissue) that is nowhere to be found on the long LP version.

When they made the edit, essentially, they removed Stevie's talking from the mix when he introduces Dizzie Gillespie, and this short instrumental part precedes the harmonica solo on the edit. Also, the LP version has a slight overlap of Dizzy's horn solo and Stevie's harmonica solo. For the edit, the horn solo was removed from the mix.

Robert, are you using a promo 45 as the reference? The promo 45 version "with harmonica solo" is different than the commercial 45. That much is certain.

Maybe there are two 45 versions. What does the different material consist of?