The last "1" is different than the other 1's.
The "1" in 1961 is different.
Also note that an authentic color scan will have slight red or blue colorization around characters. There is none present here.
Looks as if they used another birth certificate from someone born in the 60’s whose mother’s first name was Ann and last name started with “D”. It should also be noted that Stanley Ann Dunham’s signature at the bottom of the BC doesn’t match up with her signature on her SS card at all.