1st welcome aboard.
Of course the seals may be buggered as you suspect. But there are other possiblities.
Now it's a bit hard to see what you mean in the pic, but I assume the gray plastic bit in the pic is the latch that closes the roof against the windscreen frame.
I could be that the latch needs adjusting to pull the roof closed tighter, in order to make a better seal.
Here is a link to a thread on the subject:
https://www.the-t-bar.com/forum/9-mgf-tf-pitstop/98567-soft-top-front-latches
The other possibility is that the door window isn't sealing properly, correcting this is a little more involved, before we go into that, first lets make sure that it is the problem.
You will need a glamorous assistant to help you with this.........you sit in the car with the roof up preferably with your camera at the ready to document the evidence for posterity.
Whist the aforementioned glamorous assistant uses the hose to spray water at and around the problem zone, this should show exactly where the problem is.
once done please report back for further instructions.
