At least sorting out the things she should have discarded years ago was now being made easier for her.
should have done :是：过去完成时,表示本应应该怎么样（实际上没有）,
being ,在这里不要单独看,要和was being made一起,被动式的过去进行时,表示过去一种持续的状态.翻译的话：was being made:在这里表示是一种动作：就是将一些东西找出来扔掉的动作,
去看了58课的全文.这句话的前面一句是将：贼把她的东西都翻出来看了个遍,
那么这就话应该是：至少,她倒是容易将那些几年前就该扔掉的东西找出来了.
So their entry into this flat was apparently not the burglasrs' first job that dat and they must have been disturbed...原句是这个呀,没发现你说的 have have 啊.