Help- Can I Change The Article Category After The Article is Published.
The quick answer to this is 'No". Once you have selected a category and published an article under this category, if you change the category, it is likely the article will be orphaned outside of all categories.
If you have published an article and wish it to be published in a different category, the easiest thing to do would be to copy the content of the article and produce a new one in the correct category, then proceed to unpublish the article in the incorrect category. (To unpublish an article, select the article and choose the 'publishing' tab, then change the date and time to some time in the past, eg the day before.