I have a D-latch on a Colorbond gate that's sticking - it gets caught most of the time and I have to either wiggle the flat bit quite a bit so it slips in, or loosen the screws on the flat bit so that its loose enough to slip under.
Here are some photos showing how misaligned, and the red arrow shows how much i need to loosen the screws to allow the flat bit to slip in:



What can I do to rectify this? I was thinking of moving the flat bit down a little to align with the latch, but I think that the holes for the new screws are going to overlap with the ones that are already in the post.