I think where the OP is getting confused is just terminology. They are saying DSD but it sounds like they did a RESORT course.
OP- DSD just gives you a nice certificate to hang on your wall and definitely you don't get the PADI OW lesson book.
He did a padi scuba diver course... its a limited certification that allows him to dive with a guide or instructor.
Scuba Diver Open Water Diving Adventure Courses - PADI Scuba Diving Training Organization