It looks like your images are 300px but your slideshow settings still have 400px…might want to check that setting for the height.
For a slide link, there are a couple ways but probably the most common (depending on what slider you are using) you can add a link to the image when it’s in the editor when using the Widgetkit slideshow:
**Also, when you insert an image for a slide, remove the class “aligncenter” that the editor (and WordPress) adds to the image tag.