The date is added on purpose as this has been requested by so many people. Many have events with the same name and the date is what distinguishes it. You\'ll have to edit the dtregister.php file to remove the date. The file is here:
/components/com_dtregister/dtregister.php
Look are lines 942-946, 7172-7176, 8982-8986 for code similar to this:
This is actually the code from 7172. $eventName pulls in the event name (believe it or not) then you can see the ( ) with the date being pulled in. Remove the date portion of the code and you should be set. If you need further help with these changes, let us know.