Why does AddWatermark make file so big?

Question

I have created a 600 x 253 72 dpi gif file.  It is only 36kb in size.  When I take a 7 page 220kb PDF file and do a cfpdf action="addwatermark" to the file, it grows from 220kb to a whopping 1.3 MB!
Strangely enough, if I open the same file in Adobe Acrobat Professional and manually add the exact same gif file as a watermark to the exact same PDF file, the result file actually got SMALLER!?!?!
You don't believe me?  Try it yourself.
Image file: https://www.calcerts.com/images/logo_main_watermark_color.gif
Original PDF: https://www.calcerts.com/BB4031.pdf
PDF File after doing a simple addwatermark: https://www.calcerts.com/BB4031_WTF.pdf
PDF File if I add the image as a watermark in Adobe Acrobat Professional 8: https://www.calcerts.com/BB4031_AdobeWatermarked.pdf
The code I used was this:
<cfpdf action="addwatermark"
  source="d:\BB4031.pdf"
  destination="d:\BB4031_WTF.pdf"
  image="D:\images\logo_main_watermark_color.gif"
  opacity = 2
  foreground = "yes"
  rotation = 0
  showonprint = "yes"
  overwrite="yes"
  position = "0,250"
  >

Answer 1

rotflmao!!!
ok, Qui-Gon.....  Teach a man to fish, and that sort of thing, right?
I found the Page Number footer code in the CFC, did not think to look there.  I thought it would have been in the CFM.  So that's done, thanks.
I added (and modified) the footer info into the Watermark example:
--WATERMARK CODE WORKS, SO I WON'T WASTE YOUR TIME POSTING THAT--
//add the javaloader dynamic proxy library (and my iText jar) to the javaloader
libpaths = [];
arrayAppend(libpaths, expandPath("/CustCFX/javaLoader/support/cfcdynamicproxy/lib/cfcdynamicproxy.jar"));
arrayAppend(libpaths, expandPath("/CustCFX/javaLoader/itext/iText-2.1.7.jar") );
//we HAVE to load the ColdFusion class path to use the dynamic proxy, as it uses ColdFusion's classes
loader = createObject("component", "CustCFX.javaLoader.JavaLoader").init(loadPaths=libpaths, loadColdFusionClassPath=true);
//initialize the building blocks used by the custom page handler 
textColor = loader.create("java.awt.Color").decode( "##000000" );
BaseFont = loader.create("com.lowagie.text.pdf.BaseFont");
textFont = BaseFont.createFont(BaseFont.COURIER, BaseFont.WINANSI, BaseFont.EMBEDDED);
//intialize the page event handler component 
eventHandler = createObject("component", "CustCFX.betterPdfPageEventHandler.PdfPageEventHandler").init( font=textFont, fontSize=8, textColor=textColor);
eventHandler.setFooterText( "My Cool Footer - The Force is with ME!!!");
//we can pass in an array of strings which name all the interfaces we want out dynamic proxy to implement
interfaces = ["com.lowagie.text.pdf.PdfPageEvent"];
//get a reference to the dynamic proxy class
CFCDynamicProxy = loader.create("com.compoundtheory.coldfusion.cfc.CFCDynamicProxy");
// create a proxy that we will pass to the iText writer
eventHandlerProxy = CFCDynamicProxy.createInstance(eventHandler, interfaces);
// adding content to each page 
i = 0; 
while (i LT totalPages) { 
   i = i + 1; 
   // Prepare to place image on OVERcontent 
   content = pdfStamper.getOverContent( javacast("int", i) ); 
   // Only needed if you are changing the opacity, blending, etcetera .. 
   content.setGState(gState); 
   // Center the watermark. Note - using deprecated methods for CF8/iText 1.4 compatability 
   rectangle = pdfStamper.getReader().getPageSizeWithRotation( javacast("int", i) ); 
   x = rectangle.left() + (rectangle.width() - img.plainWidth()) / 2; 
   y = rectangle.bottom() + (rectangle.height() - img.plainHeight()) / 2; 
   img.setAbsolutePosition(x, y); 
   content.addImage(img);
   content.saveState();
   content.beginText();
   NOW WHAT?!?!
I tried: content.setPageEvent( eventHandlerProxy ); like in the Footer example, but that errored out.  I understand what is SUPPOSED to happen here, but I am not getting the syntax.  At this point, I need to apply the eventHandler to the content.  But what everything I have tried has errored out.
One thing that I have learned is that syntax is EVERYTHING with script (that's why I love ColdFusion so much, it's much more foregiving for us non-purebread programmers. 
so once I hvae initiate the beginText, what is the syntax for applying the eventHandler to content?