Accordion Not Displaying & Functioning Correctly

I have a number of accordions on the page linked below. Each of them has a ID set to them so you can click on the associated link at the top of the page to jump down to the accordion with the terms that are from that letter of the alphabet. All of them work fine, except for the one for “S”. The letter “S” is displaying overlapping the accordion and there is a gap between the first and second items in the accordion. Clicking on the first item in the accordion doesn’t open it, bur instead takes you back to the top of the page. Clicking on “S” at the top of the page does the same thing, instead of jumping down the page to the area where the ID is placed.

All the other accordions, links and IDs are set-up the same and work fine. So I don’t know why there is a problem with this one. Any help would be great. Thanks.