This happens from time to time and I’m not sure why. I’m reasonably sure its not the site doing it. It could be the way a device transmits a picture by the most efficient method in respect of the picture proportions. It is also something that I am trying to get the definitive answer. One thing is for sure is that when it does happen I do eventually get round to straightening them out.
If anyone has any ideas as to the reason do get in touch or respond here.