Hi there, yes that is gonna leak when it rains.
I think you should be able to crank it forward manually. if you look inside the roof there is the mechanism that takes the actual hood back, if you prise off the plastic cover there should be an allen socket there and if you get an allen key in there you should be able to move it forward. That is what you have to do if the mechanism fails.
I wonder if that is what the vendor has done, cranked it forward so it is closed and sealed and then left it. It could be that the cables have stretched or need adjusting but I have no idea how you go about that.
On a side note, it is nice to see that it is not only me that get's what appear to be dog hairs stuck to the roof.