Lazy category to post linkage

I’ve de-installed and re-installed word-press several times and I’ve noticed that after several posts its will incorrectly link categories to posts.
For example it will pull up News posts for Sports.

I only have WP-O-Matic installed (apart from Akismet).

I’m not a PHP pro (though I have programmed extensively in the past).

Could someone please advise if there is a workaround/fix?

Thanks in advance