Slideshow loading issues

When my slideshows load some of the images appear small and squashed in the top left corner. If I refresh the page it usually clears the issue. But it does not look very professional.

I presume it’s when the images cannot load fast enough. My images are 80k each, is this too big? Is there something else I should be looking at?

My site:

http://www.capturefactory.co.uk/