Wordpress plugin issues
From KOP KB
NextGen Gallery
Plugin: NextGEN Gallery by Photocrati
Issue: Gallery may make a long list of images instead of putting images into a table format
Solution: switch Gallery or follow directions at https://wordpress.org/support/topic/plugin-nextgen-gallery-thumbnail-rows which looks like it could take a long time to correct.
W3 Total Cache
Plugin: W3 Total Cache https://wordpress.org/plugins/wp-super-cache/
Issue: May cause unnecessary clearing of cache from browser and from server.
Solution: Another one to try could be https://wordpress.org/plugins/wp-super-cache/