Revolution Slider not working on home page + blurry featured images

Hello,

The revolution slider on my websites homepage (www.howtogetthere.co) is only showing one slide, while there are other images for this slider. It shows arrows to indicate there are more images, yet only shows the one iamges and one small circle at the bottom center indicating there is only one image.

Also, I cannot get featured images on my blog to show in full resolution.

Help with these two topics would be much appreciated.

Thanks!

Michael