I'm going to step in with some of the things I've seen on this front seal including some things I did over the last 50 years.
Not proud but stuff happens.
Getting the seal to go on even is not the easiest thing as the crazy timing chain tensioner needs to be compressed and those of us that have put this cover on, know what a pain it is.
Tilt the cover to start the seal centered on the hub, now as soon as you push the cover to get the tensioner in place you have just turned the lip over, now you are struggling to line up the upper studs and pushing it back, all this time the spring is pulling out of it's socket in the rubber. AND YOU WONDERED WHY IT LICKED.
To see if it was installed right, just look inside the cover, sometimes the lip will be showing over a fourth of the small opening.
The secret is getting the tensioner back far enough to slide the whole thing on with major concerns of the centering of the seal with lots of lube on it. I made a tool out of a small "C" clap I cut down with a grinder to fit inside the cover. It turned out less than a 1/4 inch wide, so it could turn sideways and come out. It will take a little goop off, so put some back.
I'll try and get a picture of it, it's was left at a buddies place.
I just remembered, had to use a small block of wood on the outside. You really have to grind most of it away and get it in the right place on the spring sucker.
Wayne