I'm sorry but I don't understand your report. 

1) What do you mean by "out of order." Does it mean they does not work at all? 
2) Did you mean the code was pasted wrongly?
 

from reporter's mail:
1) Not al all, in some occasions the Ctrl C combination not replace the
last stored text.

Thanks for response, but we still need some info. Feel free to attach your response directly to this issue.
What JDK version do you use? Do alternate clipboard shortcuts (ctrl-insert, shift-insert) work? 

from reporter's mail:

JDK version 1.6.0_06

1- The alternate clipboard shortcuts (ctrl-insert, shift-insert) work,

2- Today occurs that i paint same character in a text with the purpose
of replace it by another text, the new text spelled do nor replace the
old , but it was inserted

So, the problem is that Ctrl+C/Ctrl+V randomly stop working, right? It would be helpful if you could find some pattern
in this behavior and advice us with steps how to reproduce it. Thanks

Are you using multi-keybindings such as 'Ctrl+U U' for converting text to uppercase? If so then this is known to cause
problems with copy/paste, see issue #135732 for details. Thanks

Missing info from reporter=> INCOMPLETE.

I have confirm that de Ctrl + U, U,L key combinations are the causal of the subsequent abnormal behavior of the Editor.
Try this:
1- edit Hello.java

1 class Hello 
2 {
3	public static void main(String[] args) 
4	{
5		System.out.println("Hello World!");
6	}
7}

2- paint line 5 and do Ctrl C. This copy the line to the clipboard.
3- on line 6 do Ctrl V . This duplicate de line 5 and create a new line 6.
4- paint the text Hello Word! on line 6, then do Ctrl U U. The text change to upper.
5- paint line 6 and do Ctrl C. 
6- on line 7 do Ctrl V . The new line is not correct.

I was confirm that switching to other file and then back to the first walk around the problem. 

Thanks from the detailed information. This problem is fixed in dev builds, please see issue #135732 for details.

*** This issue has been marked as a duplicate of 135732 ***