I've encountered these structures today.
I've known you since after I met you in Paris.
or
I've worked here since right/just after I graduated.
What is it? Having researched I just can say that some people consider it ok, but why, nobody explains.
Isn't it grammatically incorrect structure? I believe there must be only "since". Like:
I've known you since I met you in Paris.
What do you think of it?
Can we use "since after" or not?