NextGEN gallery question

Hello. I am using NextGEN gallery. Everything works just how I want with 2 problems.

On this gallery:

https://artalltogether.com/?page_id=102

#1 Why does there seam to be breaks in the arrangement of the slide thumbnails? How can I get it to show up in a continuous way. Notice on row #3 there are 2 empty spaces

#2 I have 29 slides on this gallery. Can I make all 29 show up together? I do not want there to be page breaks. I rather there be a scroll bar to the right of the browser and there be many rows of 4 as far as I need.

Thanks.