Hey @loopstock, thanks for reaching out, I think you posted your query on the right place — and I’ll gladly help!
Are those images in those blog posts (that are showing up wrong, generic thumbnails) stored in your Media Gallery or somewhere else? Have you changed those images along the way? Are you using any custom gallery plugins, with which you are inserting those images in? If so, which one?
But I do have a couple of suggestions for you as well:
1.) try to set those images that you would want as your thumbnails as featured and see if this changes anything.
2.) Even better — try to remove those images from your Media Gallery completely and insert them again. And run the ‘Regenerate Thumbnails’ plugin after that.
3.) If those two solutions stated above don’t work, try to one with ‘Custom Fields’ described below.
Open up the edit page of one of your blog posts, open the ‘Screen Options’ drop-down menu on the top right corner and tick the box next to ‘Custom Fields’. A new widget called ‘Custom Fields’ should appear just below your editor, where you can add a new name (e.g. “Zemanta_thumbnails”) and a value (link) to the image which you would like to use as a thumbnail for that particular blog post.
Finally, go to your plugin settings and tick the box next to ‘Use custom field for thumbnails’ and select the “Zemanta_thumbnails” custom field value (or whatever you chose to name it).
This way, you only change the value of your future (or past) blog posts, but the name of that custom field stays the same.
Either way, do let me know how it goes! I’m looking forward to your reply!
P.S.: I’m not able to find any blog posts with those wrong thumbnails on the link you posted — do you mind sending me the right one? I’d love to take a closer look!
Best,
Silvo
