Somethings not right. If I choose to link to a K2 category I can choose a single or multiple categories right? Okay so choosing a single category and hit apply I see the link change to  index.php?option=com_k2&view=itemlist&layout=category&task=category&id=53 (in admin Area) - fine it's choosing an ID. 
IF I choose more than one category and hit apply I get this link created:
index.php?option=com_k2&view=itemlist&layout=category

Is is suposed to do that? - the link is useless as it carries no category ID info so it just goes to the home page - would this be Joomla doing this? 

I'm Using K2 2.3 and Joomla 1.5.20 (not was running slightly older Joomla 1.5.17 and upgraded but don't know if this was happening before that)

Okay not a bug and just my perception. When I don't see the URL changing (in admin) I wonder how does it know what it's choosing? and if I create more than one menu item this way and use this URL they are all the same. But it seems the URL is changed on live end and it maybe my sh404SEF that was causing the issue on the live side.

Disregard issue