My website Wereld-nieuws is undergoing a big maintenance soon. I will install and configure a new theme.
Yesterday, i did a database optimalization (didnt check category after this step)
After this, i checked my category's, and all of the posts in those category's are gone, but i can see them on the front page, archives, and back-end
Some of the plugins i use:
SEO by yoast
WP to Twitter
I hope we can fix this soon together!