Scott,
it is a bit difficult to see whether you got the seal turned inside out or not but you should not have that much of a gap unless the trim piece is not seated correctly in the slots and/or is bent.
It is not intuitive and thus easy to put the seal on in reverse. Look at the outside bottom edge of the seal there should be a flap as you can see in the photo, but it does not go all around the window, only along the bottom. Whereas on the inside you should have a channel all around and your rope goes inside this channel.
Is your seal OEM or aftermarket (URO)?