Sounds like this might be an import issue that can be fixed on the next run, could you please include this in a direct email?
Is it possible to move all the content from one category to another?
If so, how do you do it?
@8shlomi is there a reason you don't just rename the category?
I want to combine two categories into one
@PitaJ do you have an answer?
@8shlomi Maybe ....
Something I am missing? Been a while since I needed to do this....
@gotwf Great idea, this is what I want to know how to move posts from one category to another
Enter Category: Topic Tools > Move All
@omega I tried it, but I do not see any category in the list, even if I search
Could it be because I changed the theme?
What version are we talkin' about here?
It is an unexpected behavior unless there are no categories created or there is a bug in play.
Do also check yout categories setup in the ACP and also the permissions/privileges too
Naturally if you are admin you should by rights see everything.