My first thoughts on seeing this post was "stop criticising other photos", but when I looked at the large version, I see what you mean.
First of all, it is a very nice picture quality wise. It probably got through as it is the (first?) 763 in the new livery.
However, there is no reason for this to be off by so many degrees. There is ample room around the aircraft for a rotate and crop. After all the recent debates on sloping runways, level horizons and vertical posts, I would not expect this to get in because it could be fixed so easily.
It is still a nice picture though.