Problem adding contact categories

Problem adding contact categories

Hi,

I'm evaluating Zoho. I'm using Zoho contacts and am trying to add a list of new categories so that I can categorize each of my imported contacts.  However, after entering 18 categories, it won't let me enter any more.  Even when I delete an existing one it still won't let me add a new one (just sits there at the Enter Category dialogue box).

Is there any limit on the number of categories you can have?  Is this limit only for the free version or does it also apply to paid versions.

Regards

Keith