67 Dart Rear Window and Trim

I sort of wondered if that is how the previous owners put the trim in. It seems like there is a lot more sealant than needed in the channels. I was debating just trying to dig out what I could and reseal it. The gasket really doesn't look likes it's in bad shape, but I guess I won't really know till I start cleaning it out. I'm not sure if the bottom trim piece I have is really correct or not. The curve seems just a little off, but it may be bent or tweaked or something.