Help pls with the Harmony Theme

Here’s my son’s site, http://www.nathanallenmusic.com

Some problems I just can’t figure out and would love some help pls.

If you scroll down the next page is mystifying;
– I don’t know where that image is from (it’s an image on my pc, but it’s not in the media folder
– it’s giving a summary of the blog pages, but I want it to be just the blog page which I have given the Order of 1

Then scroll down again and again, another image I don’t recognise

Then keep scrolling and there is the Home page which I want to hide because this is the image that I have for the full size image on the homepage

Help would be appreciated.

Thanks in advance,

Mike