Don't feel bad. I blew out the sight glass on my R1100RT once because I pounded the rear main seal in too far. It seems, you block off the PCV when you do that.... lol. Silly me.
I got the seal in there flush, I think?. I did have to start it at little angle to get it going. Maybe I damaged the inner lip? What sucks is the original seal was not leaking and I replaced it as preventative maintenance since they are known to fail north of 100k miles.