Issue resolved–
The issue was with the sideblog plugin. Version 5.1 was causing the repetitions to appear. I have downgraded to 4.5 and that has fixed the problem. I will note the issue with the sideblog developers.
update 2
The problem appears to be tied to the sub-categories to a category. Once a sub-category is marked as “no-parent” then the post will stop repeating.
update —
problem still persists when plugins are deactivated.
In addition tried upgrading pre-upgrade versions to 2.7 and the problem is there as well.
