Delete recurring event actions missing / buttons text issue

Hi there

When trying to delete a recurring event in calendar I am presented with this dialog. The language "you can delete all its occurrences, this occurrence or this and all future occurrences doesn’t seem to be represented properly in actions. If I choose all it deletes all, even the past, which I didn’t want as they stand as a record for me. Oh well. If I choose this, it removes only the one I selected. However the “this and all future” was what I wanted but I can’t execute it with the button choices as shown.