fuel injector

So my teg had a B18C1 swap by the previous owner, and few days earlier I realize that my fuel injectors are leaking fuel. I bought a injector seal kit from schucks and after I put in all of them, I have one seal left…

one seal goes onto the connection between the block and the injector, one bigger one goes between the fuel rail and the top of the injector, and there’s a small o-ring thing that goes right on top of the injector. And I still have one left…

am I missing something?

Do you have one set of pieces left or only one single piece? Are you sure you installed all needed parts on each injector?

This diagram shows all the pieces which are installed on/around the injector:

thank you!! when I took it appart, there was no #4