Indeed you are- but you have caught us early in our new platform, following a long overdue rebuild of the EOL codebase, so not all our tools are in place yet.
Routine cleanup, for one-off errors, is normally performed by our online curator community. Not all of their tools are up yet, as we are still importing the curation actions (like image rating) that they performed in the old platform. This ongoing curation import may be what updated the Polypodiidae page since your error report. When their prior work is restored, we will stand the curator tools back up so curation work can continue. (Normally that shell image should have been hidden on that page, not just downrated).
In the meantime, any registered EOL member can perform a superficial fix by selecting a different image from the taxon page gallery to display in the overview. I’m afraid we have not yet implemented shared login between this forum and eol.org, so that does require a separate registration. You are welcome to report errors here just as you did, and/or register at eol.org if you’d like to curate the overview image of pages of interest directly.
Thanks for your patience, and your report!