Here are a few pictures of what I believe were the way the seals were originally fitted but I don’t think S1 & S2 cars were ever designed to be water tight … Probably the reason why it takes so long to erect the hood and they had rubber mats!
Another point to check is that the fibreglass finishing trim has the drain hole and it is not blocked, it should also have a drain pipe attached inside the door going to the bottom of the door.