The signatures look abit odd as they have been kept in a plastic wrap for which remains on the card in the photos
Agreed about the quality of the signature too, both differ to original auto
Here is an article on the 2011-12 Hoops Autograph SPs (PDF List of individual SP cards).
It is not a separate release, it's just acknowledging that certain autograph cards were short printed.
1 card - #171 Harden
25 or less - 48 cards (including #258 Bryant and #270 Durant)
SP - 82 cards
So by your definition 82 cards are SP and 48 cards are SSP (does that make the Harden SSSP?).
The Autograph cards themselves however will still be in the same format as the images above.
#28 Derrick Rose Autograph is listed in article as SP (to 25 or less, same as your two cards). Here is a link that card on COMC where you can see the back of the card.