If all you have is one copy of
Unheeded in discard, you show that.
If you have two or more copies of
Unheeded in discard, and no other
events in discard, you show two copies of
Unheeded. Obviously you still get to them take one into hand. In this case the "show 2 events" part takes precedence over the "two different titles" because you do not have an event with a different title to show.
If you have
Unheeded and another event NOT named "
Unheeded" in discard, you have to show those two differently-titled events. In this case, you
cannot choose two copies of
Unheeded, since you are able (whether you want to or not) to show a
event with a title other than "
Unheeded".