magento showing wrong product count in category

Question

I have a strange issue and seems many are having the same on internet. Below picture will define my issue and also my magento version is 1.7

Answer 1

This will fix them all.

DELETE FROM 
catalog_category_product 
where product_id NOT IN (SELECT entity_id FROM (catalog_product_entity)) 

Then, implement the solution in the observer to keep it from happening again.