Frame layout changes when button is pressed again...

Question

Okay so basically I have a button on my frame and when it's pressed it opens up another frame. This is fine, but when the button is pressed again it opens up the frame again but the layout is all over the place.
Here is the code:
if (ev.getSource() == seating)
else
               seatdisplay = new JFrame("Seating Display");
               seatdisplay.getContentPane().setBackground(Color.orange);
               seatdisplay.setLayout(new BorderLayout()); //Define border layout
               seatdisplay.setVisible(true);
               seatdisplay.setSize(550,500);
               seatdisplay.add(panelLeft, BorderLayout.WEST); //Position object to the west
               seatdisplay.add(panelMiddle, BorderLayout.CENTER);
               seatdisplay.add(panelRight, BorderLayout.EAST);
               seatdisplay.add(panelTop, BorderLayout.NORTH);
               seatdisplay.add(panelBottom, BorderLayout.SOUTH);
               panelLeft.setLayout(new GridLayout(4,2)); //Define new grid layout
               panelLeft.setBackground(Color.black);
               panelLeft.add(a1 = new JButton("A1")); //Add buttons
               panelLeft.add(a2 = new JButton("A2"));
               panelLeft.add(a3 = new JButton("A3"));
               panelLeft.add(a4 = new JButton("A4"));
               panelLeft.add(a5 = new JButton("A5"));
               panelLeft.add(a6 = new JButton("A6"));
               panelLeft.add(a7 = new JButton("A7"));
               panelLeft.add(a8 = new JButton("A8"));
               panelMiddle.setLayout(new GridLayout(3,6));
               panelMiddle.setBackground(Color.orange);
               panelMiddle.add(empty = new JButton("")); empty.setVisible(false);
               panelMiddle.add(b1 = new JButton("B1"));
               panelMiddle.add(b2 = new JButton("B2"));
               panelMiddle.add(b3 = new JButton("B3"));
               panelMiddle.add(b4 = new JButton("B4"));
               panelMiddle.add(empty3 = new JButton("")); empty3.setVisible(false);
               panelMiddle.add(empty1 = new JButton("")); empty1.setVisible(false);
               panelMiddle.add(b5 = new JButton("B5"));
               panelMiddle.add(b6 = new JButton("B6"));
               panelMiddle.add(b7 = new JButton("B7"));
               panelMiddle.add(b8 = new JButton("B8"));
               panelMiddle.add(empty4 = new JButton("")); empty4.setVisible(false);
               panelMiddle.add(empty2 = new JButton("")); empty2.setVisible(false);
               panelMiddle.add(b9 = new JButton("B9"));
               panelMiddle.add(b10 = new JButton("B10"));
               panelMiddle.add(b11 = new JButton("B11"));
               panelMiddle.add(b12 = new JButton("B12"));
               panelRight.setLayout(new GridLayout(4,2));
               panelRight.setBackground(Color.black);
               panelRight.add(c1 = new JButton("C1"));
               panelRight.add(c2 = new JButton("C2"));
               panelRight.add(c3 = new JButton("C3"));
               panelRight.add(c4 = new JButton("C4"));
               panelRight.add(c5 = new JButton("C5"));
               panelRight.add(c6 = new JButton("C6"));
               panelRight.add(c7 = new JButton("C7"));
               panelRight.add(c8 = new JButton("C8"));
}The seat button is pressed and seatdisplay frame is opened, however, if I press the seat button twice another seatdisplay frame is opened and the layout is all over the place. Do I need to do some sort of refresh?

Answer 1

Swing related questions should be posted in the Swing forum.
If you need further help then you need to create a "Short, Self Contained, Compilable and Executable, Example Program (SSCCE)", that demonstrates the incorrect behaviour.
http://homepage1.nifty.com/algafield/sscce.html
Don't forget to use the "Code Formatting Tags", so the posted code retains its original formatting.
http://forum.java.sun.com/help.jspa?sec=formatting