Thanks Jeff. What spring steel clips?
Anyway, all my seals are new and I did cut the ends a bit on an angle, and I did (had to) keep longitudinal compression on the seals while inserting them in order to get the length right (otherwise they would have ended up too long). But the gap still exists between the chrome pieces. The rubber pieces seal nicely end-to-end at that spot, however. I'm concluding that it must have something to do with the door height (which I'm not going to mess with). If the piping/windlace I'm going to install along the inner door jamb does not stop the leaking there during our heavy Florida downpours, I'll probably figure a way to insert a piece of rubber in that gap.