Button Icon Alignment/Placement

I can’t figure out where to edit the template so that the button icons in the screenshot below are all on the same row and center. It appears that a maximum of 5 has been set for a row but I need to set it to 6. And when I delete one of the slider items (thinking the one on the bottom will move up), that 6th icon remains on the row below it.

Screenshot: https://www.screencast.com/t/YBHbGg2vV

I’ve looked in the individual section rules (edit row, edit slider).

https://www.screencast.com/t/qxkXRn0CEj5L

I’ve looked through all the tabs in Theme Options.

https://www.screencast.com/t/NlE5qDUDkcb

I’ve looked in Appearance > Customize as well.

https://www.screencast.com/t/6EhURAVJp

I can’t figure out where to increase the number of row items, or get them all to line up on the same row.