Saving a Signed PDF, without the '-signed' suffix being added to the filename

Question

I am experiencing an issue with Adobe reader 11.
I have a number of users who will be authorizing and signing invoices with a digital Jpeg signature (not Echosign).
The intention is then to save the file in the same location on the Network, replacing the original file.
However, since using version 11, it appears that as soon as you add a signature to an invoice, you are prompted to save the file as: {filename}-signed
Having the '-signed' added to the file, then means we will be left with 2 copies of the invoice on the network drive. And as the other part of the process involves opening the invoices by using a hyperlink, we will have big problems with duplicated files etc...
I know that the user should be able to delete the '-signed' extension, but errors may occur, where they don't always delete accurately.
So, is there a way to switch this facility off?
In Version 10.1.6 this didn't appear to be a problem, but i have a user who experiences the problem i 10.1.7 also. OS include Win 7 And Xp, dependent on which user, but the problem isn't OS specific
thanks for your help

Answer 1

I did not make myself clear enough - my mistake. The user is prompted with the following code - which does not save the modified document on YES.
var cMsg = "Do you want to save changes to ‘PFSL-18, 06.96.pdf’ before closing?";
var nRtn = app.alert(cMsg,1,3,"PFSL-18");
//Yes
if(nRtn==4)
this.saveAs("../Mutual Fund Forms/PFSL-18, 06.96.pdf", this);
this.closeDoc("../Mutual Fund Forms/PFSL-18, 06.96.pdf", this);
else
//No
this.closeDoc("../Mutual Fund Forms/PFSL-18, 06.96.pdf", this);