Leaking French doors

[gibby69]

Hi, our upvc French doors leaking from the inside bottom on the left and right corner and also the middle, I’ve put one picture of the right inside. From what I can work out is that the water is entering from the top of the door seal on the outside, running down inside the door and instead of going into the drain holes on the threshold, it’s coming into the house instead, that’s my best guess as I’m out of answers. The top picture shows inside, not sure if the drain channel is slightly running back therefore the water isn’t running to the nearest drain hole, I’m afraid after looking for weeks on end I’ve no definitive answer, just a guess.

Thanks in advance for any suggestions.