I have a multisite using one install of Joomla and am using DT register for events management, in dtregister I have 2 categories (1 for each site)
I then create a single event and assign it to both categories to display on both sites.

When I create my SEF Url through JoomSEF Manager I am creating a pair of links that have the same event id but Itemid is different.

My "real URl"
index.php?option=com_dtregister&controller=event&eventId=66&layout=eventdetail&task=event_detail&view=event&Itemid=306
and
index.php?option=com_dtregister&controller=event&eventId=66&layout=eventdetail&task=event_detail&view=event&Itemid=338

My SEF url
concerts-tickets/MY-EVENT-NAME
and
tickets/My-EVENT-NAME

the problem then becomes that the first link (concerts-tickets/MY-EVENT-NAME) overwrites the second link on the other site (tickets/My-EVENT-NAME) for that URL. Is there any way around this so each event will have it's own SEF URL