Okay ... it's time to play the bazillion questions game ...

Go to phpMyAdmin and check the two tables:
categories
categories_description

for categories_id 80 ...

In the table:
categories

is there just the 1 record?

what do you see in the records for it?

In the table:
categories_description

is there just 1 record?

what do you see in the records for it?


Check the table:
products_to_categories

search for the categories_id 80 ... do you find any records? (you shouldn't)


Go back to the table:
categories

search for the categories_id 83 what is the parent_id ...
search for the categories_id 91 what is the parent_id ...
search for the categories_id 107 what is the parent_id ...