Java BlockingQueue confusion

I am currently reading about Java BlockingQueue and this example is given on many websites for a simple implementation of the BlockingQueue. The code is simple but I am a bit confused. For example lets say we fill up the queue, then we try to enqueue 3 more times. This will make the 3 threads wait. Then when we call dequeue, the code in the dequeue method will enter the second if statement and it will notify all threads. Won't this mean that the 3 threads waiting will all add nodes to the queue? That means we will have 2 more nodes than the limit? I am pretty sure I misunderstood something here so I could use some small explanation.

public class BlockingQueue {

  private List queue = new LinkedList();
  private int  limit = 10;

  public BlockingQueue(int limit){
    this.limit = limit;
  }


  public synchronized void enqueue(Object item)
  throws InterruptedException  {
    while(this.queue.size() == this.limit) {
      wait();
    }
    this.queue.add(item);
    if(this.queue.size() == 1) {
      notifyAll();
    }
  }


  public synchronized Object dequeue()
  throws InterruptedException{
    while(this.queue.size() == 0){
      wait();
    }
    if(this.queue.size() == this.limit){
      notifyAll();
    }

    return this.queue.remove(0);
  }

}

Copyright License：
Author:「user737163」,Reproduced under the CC 4.0 BY-SA copyright license with link to original source & disclaimer.
Link to：https://stackoverflow.com/questions/63299412/java-blockingqueue-confusion