[Plugin: NextGEN Gallery] Alignment Slideshow

I love this plugin but am having issues with formatting it in posts.
Why doesn’t it let me have three images aligned horizontally- it pushes the third image to the next line.

Also I can’t get the slideshow to work, the […] just reads as text.

Suggestions please? I love the look of this and will happily donate if I can make it work for our site.

Thanks! David

https://www.ads-software.com/extend/plugins/nextgen-gallery/