With the information included in your screenshots, I was able to locate the person in your tree.
The visible part of the issue is the lack of the small down arrow next to the marriage citations link.
The underlying issue may be caused by having 2 citations for the one fact. Attached screenshot shows what I see on my GGF's profile on a fact for which there are 2 citations. I have a down error and on hover, I get a dropdown of the 2 sources, so that I can select one.
Are you still having problems this morning? There was a several-hour site maintenance overnight, which MAY fixed some issues.
Have you tried deleting one of the citations, exiting the profile and then adding it again?
Have you tried deleting your ancestry-site only cookies? That action cures a multitude of ills with the site.