problems with sorting images in my gallery plugin

i downloaded Image Gallery Reloaded plugin and it is an amazing gallery, EXCEPT it will not allow me to put order to my pictures in the slideshow. if i can’t get it to do that it is useless. it tries to, it allows me to…and it looks like it works, but then when i go refresh the page nothing changes on the page. you can check it out on my website at: https://davidbalber.com/?page_id=635

any help would be greatly appreciated! i tried blogging on the author’s website but the last blog was years ago.