This sentence is correct because it is given as an example in a book (grammar and vocabulary for cambridge advanced and proficiency) :Since I've known him, he's always worn the same sweater
but this one should be corrected:
Since I've met her, I've never seen her lose her temper
and the answer key says that it should be:
Since I met her, I've never seen her lose her temper
I'm disorientated, can somebody explain it to me?